diff --unified --recursive --new-file linux-2.6.12.5/include/linux/ring.h linux-2.6.12.5-1-686-smp-ring3/include/linux/ring.h --- linux-2.6.12.5/include/linux/ring.h 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.12.5-1-686-smp-ring3/include/linux/ring.h 2005-10-22 23:50:44.951445250 +0200 @@ -0,0 +1,108 @@ +/* + * Definitions for packet ring + * + * 2004 - Luca Deri + */ +#ifndef __RING_H +#define __RING_H + + +#define INCLUDE_MAC_INFO + +#ifdef INCLUDE_MAC_INFO +#define SKB_DISPLACEMENT 14 /* Include MAC address information */ +#else +#define SKB_DISPLACEMENT 0 /* Do NOT include MAC address information */ +#endif + +#define RING_MAGIC +#define RING_MAGIC_VALUE 0x88 +#define RING_FLOWSLOT_VERSION 5 +#define RING_VERSION "3.0" + +#define SO_ADD_TO_CLUSTER 99 +#define SO_REMOVE_FROM_CLUSTER 100 +#define SO_SET_REFLECTOR 101 + +/* *********************************** */ + +#ifndef HAVE_PCAP +struct pcap_pkthdr { + struct timeval ts; /* time stamp */ + u_int32_t caplen; /* length of portion present */ + u_int32_t len; /* length this packet (off wire) */ +}; +#endif + +/* *********************************** */ + +enum cluster_type { + cluster_per_flow = 0, + cluster_round_robin +}; + +/* *********************************** */ + +#define RING_MIN_SLOT_SIZE (60+sizeof(struct pcap_pkthdr)) +#define RING_MAX_SLOT_SIZE (1514+sizeof(struct pcap_pkthdr)) + +/* *********************************** */ + +typedef struct flowSlotInfo { + u_int16_t version, sample_rate; + u_int32_t tot_slots, slot_len, tot_mem; + + u_int64_t tot_pkts, tot_lost; + u_int64_t tot_insert, tot_read; + u_int16_t insert_idx; + u_int16_t remove_idx; +} FlowSlotInfo; + +/* *********************************** */ + +typedef struct flowSlot { +#ifdef RING_MAGIC + u_char magic; /* It must alwasy be zero */ +#endif + u_char slot_state; /* 0=empty, 1=full */ + u_char bucket; /* bucket[bucketLen] */ +} FlowSlot; + +/* *********************************** */ + +#ifdef __KERNEL__ + +FlowSlotInfo* getRingPtr(void); +int allocateRing(char *deviceName, u_int numSlots, + u_int bucketLen, u_int sampleRate); +unsigned int pollRing(struct file *fp, struct poll_table_struct * wait); +void deallocateRing(void); + +/* ************************* */ + +typedef int (*handle_ring_skb)(struct sk_buff *skb, + u_char recv_packet, u_char real_skb); +extern handle_ring_skb get_skb_ring_handler(void); +extern void set_skb_ring_handler(handle_ring_skb the_handler); +extern void do_skb_ring_handler(struct sk_buff *skb, + u_char recv_packet, u_char real_skb); + +typedef int (*handle_ring_buffer)(struct net_device *dev, + char *data, int len); +extern handle_ring_buffer get_buffer_ring_handler(void); +extern void set_buffer_ring_handler(handle_ring_buffer the_handler); +extern int do_buffer_ring_handler(struct net_device *dev, + char *data, int len); +#endif /* __KERNEL__ */ + +/* *********************************** */ + +#define PF_RING 27 /* Packet Ring */ +#define SOCK_RING PF_RING + +/* ioctl() */ +#define SIORINGPOLL 0x8888 + +/* *********************************** */ + +#endif /* __RING_H */ diff --unified --recursive --new-file linux-2.6.12.5/net/Kconfig linux-2.6.12.5-1-686-smp-ring3/net/Kconfig --- linux-2.6.12.5/net/Kconfig 2005-08-15 02:20:18.000000000 +0200 +++ linux-2.6.12.5-1-686-smp-ring3/net/Kconfig 2005-10-22 23:50:45.535481750 +0200 @@ -72,6 +72,7 @@ Say Y unless you know what you are doing. +source "net/ring/Kconfig" config INET bool "TCP/IP networking" ---help--- diff --unified --recursive --new-file linux-2.6.12.5/net/Makefile linux-2.6.12.5-1-686-smp-ring3/net/Makefile --- linux-2.6.12.5/net/Makefile 2005-08-15 02:20:18.000000000 +0200 +++ linux-2.6.12.5-1-686-smp-ring3/net/Makefile 2005-10-22 23:50:45.491479000 +0200 @@ -41,6 +41,7 @@ obj-$(CONFIG_DECNET) += decnet/ obj-$(CONFIG_ECONET) += econet/ obj-$(CONFIG_VLAN_8021Q) += 8021q/ +obj-$(CONFIG_RING) += ring/ obj-$(CONFIG_IP_SCTP) += sctp/ ifeq ($(CONFIG_NET),y) diff --unified --recursive --new-file linux-2.6.12.5/net/Makefile.ORG linux-2.6.12.5-1-686-smp-ring3/net/Makefile.ORG --- linux-2.6.12.5/net/Makefile.ORG 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.12.5-1-686-smp-ring3/net/Makefile.ORG 2005-10-22 23:50:45.483478500 +0200 @@ -0,0 +1,48 @@ +# +# Makefile for the linux networking. +# +# 2 Sep 2000, Christoph Hellwig +# Rewritten to use lists instead of if-statements. +# + +obj-y := nonet.o + +obj-$(CONFIG_NET) := socket.o core/ + +tmp-$(CONFIG_COMPAT) := compat.o +obj-$(CONFIG_NET) += $(tmp-y) + +# LLC has to be linked before the files in net/802/ +obj-$(CONFIG_LLC) += llc/ +obj-$(CONFIG_NET) += ethernet/ 802/ sched/ netlink/ +obj-$(CONFIG_INET) += ipv4/ +obj-$(CONFIG_XFRM) += xfrm/ +obj-$(CONFIG_UNIX) += unix/ +ifneq ($(CONFIG_IPV6),) +obj-y += ipv6/ +endif +obj-$(CONFIG_PACKET) += packet/ +obj-$(CONFIG_NET_KEY) += key/ +obj-$(CONFIG_NET_SCHED) += sched/ +obj-$(CONFIG_BRIDGE) += bridge/ +obj-$(CONFIG_IPX) += ipx/ +obj-$(CONFIG_ATALK) += appletalk/ +obj-$(CONFIG_WAN_ROUTER) += wanrouter/ +obj-$(CONFIG_X25) += x25/ +obj-$(CONFIG_LAPB) += lapb/ +obj-$(CONFIG_NETROM) += netrom/ +obj-$(CONFIG_ROSE) += rose/ +obj-$(CONFIG_AX25) += ax25/ +obj-$(CONFIG_IRDA) += irda/ +obj-$(CONFIG_BT) += bluetooth/ +obj-$(CONFIG_SUNRPC) += sunrpc/ +obj-$(CONFIG_RXRPC) += rxrpc/ +obj-$(CONFIG_ATM) += atm/ +obj-$(CONFIG_DECNET) += decnet/ +obj-$(CONFIG_ECONET) += econet/ +obj-$(CONFIG_VLAN_8021Q) += 8021q/ +obj-$(CONFIG_IP_SCTP) += sctp/ + +ifeq ($(CONFIG_NET),y) +obj-$(CONFIG_SYSCTL) += sysctl_net.o +endif diff --unified --recursive --new-file linux-2.6.12.5/net/core/dev.c linux-2.6.12.5-1-686-smp-ring3/net/core/dev.c --- linux-2.6.12.5/net/core/dev.c 2005-08-15 02:20:18.000000000 +0200 +++ linux-2.6.12.5-1-686-smp-ring3/net/core/dev.c 2005-10-22 23:50:45.479478250 +0200 @@ -115,6 +115,56 @@ #endif /* CONFIG_NET_RADIO */ #include +#if defined (CONFIG_RING) || defined(CONFIG_RING_MODULE) + +/* #define RING_DEBUG */ + +#include +#include + +static handle_ring_skb ring_handler = NULL; + +handle_ring_skb get_skb_ring_handler() { return(ring_handler); } + +void set_skb_ring_handler(handle_ring_skb the_handler) { + ring_handler = the_handler; +} + +void do_skb_ring_handler(struct sk_buff *skb, + u_char recv_packet, u_char real_skb) { + if(ring_handler) + ring_handler(skb, recv_packet, real_skb); +} + +/* ******************* */ + +static handle_ring_buffer buffer_ring_handler = NULL; + +handle_ring_buffer get_buffer_ring_handler() { return(buffer_ring_handler); } + +void set_buffer_ring_handler(handle_ring_buffer the_handler) { + buffer_ring_handler = the_handler; +} + +int do_buffer_ring_handler(struct net_device *dev, char *data, int len) { + if(buffer_ring_handler) { + buffer_ring_handler(dev, data, len); + return(1); + } else + return(0); +} + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) +EXPORT_SYMBOL(get_skb_ring_handler); +EXPORT_SYMBOL(set_skb_ring_handler); +EXPORT_SYMBOL(do_skb_ring_handler); + +EXPORT_SYMBOL(get_buffer_ring_handler); +EXPORT_SYMBOL(set_buffer_ring_handler); +EXPORT_SYMBOL(do_buffer_ring_handler); +#endif + +#endif /* This define, if set, will randomly drop a packet when congestion * is more than moderate. It helps fairness in the multi-interface * case when one of them is a hog, but it kills performance for the @@ -1293,6 +1343,10 @@ skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_EGRESS); #endif if (q->enqueue) { +#if defined (CONFIG_RING) || defined(CONFIG_RING_MODULE) + if(ring_handler) ring_handler(skb, 0, 1); +#endif /* CONFIG_RING */ + /* Grab device queue */ spin_lock(&dev->queue_lock); @@ -1509,6 +1563,13 @@ preempt_disable(); err = netif_rx(skb); +#if defined (CONFIG_RING) || defined(CONFIG_RING_MODULE) + if(ring_handler && ring_handler(skb, 1, 1)) { + /* The packet has been copied into a ring */ + return(NET_RX_SUCCESS); + } +#endif /* CONFIG_RING */ + if (local_softirq_pending()) do_softirq(); preempt_enable(); @@ -1655,6 +1716,13 @@ int ret = NET_RX_DROP; unsigned short type; +#if defined (CONFIG_RING) || defined(CONFIG_RING_MODULE) + if(ring_handler && ring_handler(skb, 1, 1)) { + /* The packet has been copied into a ring */ + return(NET_RX_SUCCESS); + } +#endif /* CONFIG_RING */ + /* if we've gotten here through NAPI, check netpoll */ if (skb->dev->poll && netpoll_rx(skb)) return NET_RX_DROP; diff --unified --recursive --new-file linux-2.6.12.5/net/core/dev.c.ORG linux-2.6.12.5-1-686-smp-ring3/net/core/dev.c.ORG --- linux-2.6.12.5/net/core/dev.c.ORG 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.12.5-1-686-smp-ring3/net/core/dev.c.ORG 2005-10-22 23:50:45.203461000 +0200 @@ -0,0 +1,3385 @@ +/* + * NET3 Protocol independent device support routines. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * Derived from the non IP parts of dev.c 1.0.19 + * Authors: Ross Biro + * Fred N. van Kempen, + * Mark Evans, + * + * Additional Authors: + * Florian la Roche + * Alan Cox + * David Hinds + * Alexey Kuznetsov + * Adam Sulmicki + * Pekka Riikonen + * + * Changes: + * D.J. Barrow : Fixed bug where dev->refcnt gets set + * to 2 if register_netdev gets called + * before net_dev_init & also removed a + * few lines of code in the process. + * Alan Cox : device private ioctl copies fields back. + * Alan Cox : Transmit queue code does relevant + * stunts to keep the queue safe. + * Alan Cox : Fixed double lock. + * Alan Cox : Fixed promisc NULL pointer trap + * ???????? : Support the full private ioctl range + * Alan Cox : Moved ioctl permission check into + * drivers + * Tim Kordas : SIOCADDMULTI/SIOCDELMULTI + * Alan Cox : 100 backlog just doesn't cut it when + * you start doing multicast video 8) + * Alan Cox : Rewrote net_bh and list manager. + * Alan Cox : Fix ETH_P_ALL echoback lengths. + * Alan Cox : Took out transmit every packet pass + * Saved a few bytes in the ioctl handler + * Alan Cox : Network driver sets packet type before + * calling netif_rx. Saves a function + * call a packet. + * Alan Cox : Hashed net_bh() + * Richard Kooijman: Timestamp fixes. + * Alan Cox : Wrong field in SIOCGIFDSTADDR + * Alan Cox : Device lock protection. + * Alan Cox : Fixed nasty side effect of device close + * changes. + * Rudi Cilibrasi : Pass the right thing to + * set_mac_address() + * Dave Miller : 32bit quantity for the device lock to + * make it work out on a Sparc. + * Bjorn Ekwall : Added KERNELD hack. + * Alan Cox : Cleaned up the backlog initialise. + * Craig Metz : SIOCGIFCONF fix if space for under + * 1 device. + * Thomas Bogendoerfer : Return ENODEV for dev_open, if there + * is no device open function. + * Andi Kleen : Fix error reporting for SIOCGIFCONF + * Michael Chastain : Fix signed/unsigned for SIOCGIFCONF + * Cyrus Durgin : Cleaned for KMOD + * Adam Sulmicki : Bug Fix : Network Device Unload + * A network device unload needs to purge + * the backlog queue. + * Paul Rusty Russell : SIOCSIFNAME + * Pekka Riikonen : Netdev boot-time settings code + * Andrew Morton : Make unregister_netdevice wait + * indefinitely on dev->refcnt + * J Hadi Salim : - Backlog queue sampling + * - netif_rx() feedback + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#ifdef CONFIG_NET_RADIO +#include /* Note : will define WIRELESS_EXT */ +#include +#endif /* CONFIG_NET_RADIO */ +#include + +/* This define, if set, will randomly drop a packet when congestion + * is more than moderate. It helps fairness in the multi-interface + * case when one of them is a hog, but it kills performance for the + * single interface case so it is off now by default. + */ +#undef RAND_LIE + +/* Setting this will sample the queue lengths and thus congestion + * via a timer instead of as each packet is received. + */ +#undef OFFLINE_SAMPLE + +/* + * The list of packet types we will receive (as opposed to discard) + * and the routines to invoke. + * + * Why 16. Because with 16 the only overlap we get on a hash of the + * low nibble of the protocol value is RARP/SNAP/X.25. + * + * NOTE: That is no longer true with the addition of VLAN tags. Not + * sure which should go first, but I bet it won't make much + * difference if we are running VLANs. The good news is that + * this protocol won't be in the list unless compiled in, so + * the average user (w/out VLANs) will not be adversly affected. + * --BLG + * + * 0800 IP + * 8100 802.1Q VLAN + * 0001 802.3 + * 0002 AX.25 + * 0004 802.2 + * 8035 RARP + * 0005 SNAP + * 0805 X.25 + * 0806 ARP + * 8137 IPX + * 0009 Localtalk + * 86DD IPv6 + */ + +static DEFINE_SPINLOCK(ptype_lock); +static struct list_head ptype_base[16]; /* 16 way hashed list */ +static struct list_head ptype_all; /* Taps */ + +#ifdef OFFLINE_SAMPLE +static void sample_queue(unsigned long dummy); +static struct timer_list samp_timer = TIMER_INITIALIZER(sample_queue, 0, 0); +#endif + +/* + * The @dev_base list is protected by @dev_base_lock and the rtln + * semaphore. + * + * Pure readers hold dev_base_lock for reading. + * + * Writers must hold the rtnl semaphore while they loop through the + * dev_base list, and hold dev_base_lock for writing when they do the + * actual updates. This allows pure readers to access the list even + * while a writer is preparing to update it. + * + * To put it another way, dev_base_lock is held for writing only to + * protect against pure readers; the rtnl semaphore provides the + * protection against other writers. + * + * See, for example usages, register_netdevice() and + * unregister_netdevice(), which must be called with the rtnl + * semaphore held. + */ +struct net_device *dev_base; +static struct net_device **dev_tail = &dev_base; +DEFINE_RWLOCK(dev_base_lock); + +EXPORT_SYMBOL(dev_base); +EXPORT_SYMBOL(dev_base_lock); + +#define NETDEV_HASHBITS 8 +static struct hlist_head dev_name_head[1<type == htons(ETH_P_ALL)) { + netdev_nit++; + list_add_rcu(&pt->list, &ptype_all); + } else { + hash = ntohs(pt->type) & 15; + list_add_rcu(&pt->list, &ptype_base[hash]); + } + spin_unlock_bh(&ptype_lock); +} + +extern void linkwatch_run_queue(void); + + + +/** + * __dev_remove_pack - remove packet handler + * @pt: packet type declaration + * + * Remove a protocol handler that was previously added to the kernel + * protocol handlers by dev_add_pack(). The passed &packet_type is removed + * from the kernel lists and can be freed or reused once this function + * returns. + * + * The packet type might still be in use by receivers + * and must not be freed until after all the CPU's have gone + * through a quiescent state. + */ +void __dev_remove_pack(struct packet_type *pt) +{ + struct list_head *head; + struct packet_type *pt1; + + spin_lock_bh(&ptype_lock); + + if (pt->type == htons(ETH_P_ALL)) { + netdev_nit--; + head = &ptype_all; + } else + head = &ptype_base[ntohs(pt->type) & 15]; + + list_for_each_entry(pt1, head, list) { + if (pt == pt1) { + list_del_rcu(&pt->list); + goto out; + } + } + + printk(KERN_WARNING "dev_remove_pack: %p not found.\n", pt); +out: + spin_unlock_bh(&ptype_lock); +} +/** + * dev_remove_pack - remove packet handler + * @pt: packet type declaration + * + * Remove a protocol handler that was previously added to the kernel + * protocol handlers by dev_add_pack(). The passed &packet_type is removed + * from the kernel lists and can be freed or reused once this function + * returns. + * + * This call sleeps to guarantee that no CPU is looking at the packet + * type after return. + */ +void dev_remove_pack(struct packet_type *pt) +{ + __dev_remove_pack(pt); + + synchronize_net(); +} + +/****************************************************************************** + + Device Boot-time Settings Routines + +*******************************************************************************/ + +/* Boot time configuration table */ +static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX]; + +/** + * netdev_boot_setup_add - add new setup entry + * @name: name of the device + * @map: configured settings for the device + * + * Adds new setup entry to the dev_boot_setup list. The function + * returns 0 on error and 1 on success. This is a generic routine to + * all netdevices. + */ +static int netdev_boot_setup_add(char *name, struct ifmap *map) +{ + struct netdev_boot_setup *s; + int i; + + s = dev_boot_setup; + for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) { + if (s[i].name[0] == '\0' || s[i].name[0] == ' ') { + memset(s[i].name, 0, sizeof(s[i].name)); + strcpy(s[i].name, name); + memcpy(&s[i].map, map, sizeof(s[i].map)); + break; + } + } + + return i >= NETDEV_BOOT_SETUP_MAX ? 0 : 1; +} + +/** + * netdev_boot_setup_check - check boot time settings + * @dev: the netdevice + * + * Check boot time settings for the device. + * The found settings are set for the device to be used + * later in the device probing. + * Returns 0 if no settings found, 1 if they are. + */ +int netdev_boot_setup_check(struct net_device *dev) +{ + struct netdev_boot_setup *s = dev_boot_setup; + int i; + + for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) { + if (s[i].name[0] != '\0' && s[i].name[0] != ' ' && + !strncmp(dev->name, s[i].name, strlen(s[i].name))) { + dev->irq = s[i].map.irq; + dev->base_addr = s[i].map.base_addr; + dev->mem_start = s[i].map.mem_start; + dev->mem_end = s[i].map.mem_end; + return 1; + } + } + return 0; +} + + +/** + * netdev_boot_base - get address from boot time settings + * @prefix: prefix for network device + * @unit: id for network device + * + * Check boot time settings for the base address of device. + * The found settings are set for the device to be used + * later in the device probing. + * Returns 0 if no settings found. + */ +unsigned long netdev_boot_base(const char *prefix, int unit) +{ + const struct netdev_boot_setup *s = dev_boot_setup; + char name[IFNAMSIZ]; + int i; + + sprintf(name, "%s%d", prefix, unit); + + /* + * If device already registered then return base of 1 + * to indicate not to probe for this interface + */ + if (__dev_get_by_name(name)) + return 1; + + for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) + if (!strcmp(name, s[i].name)) + return s[i].map.base_addr; + return 0; +} + +/* + * Saves at boot time configured settings for any netdevice. + */ +int __init netdev_boot_setup(char *str) +{ + int ints[5]; + struct ifmap map; + + str = get_options(str, ARRAY_SIZE(ints), ints); + if (!str || !*str) + return 0; + + /* Save settings */ + memset(&map, 0, sizeof(map)); + if (ints[0] > 0) + map.irq = ints[1]; + if (ints[0] > 1) + map.base_addr = ints[2]; + if (ints[0] > 2) + map.mem_start = ints[3]; + if (ints[0] > 3) + map.mem_end = ints[4]; + + /* Add new entry to the list */ + return netdev_boot_setup_add(str, &map); +} + +__setup("netdev=", netdev_boot_setup); + +/******************************************************************************* + + Device Interface Subroutines + +*******************************************************************************/ + +/** + * __dev_get_by_name - find a device by its name + * @name: name to find + * + * Find an interface by name. Must be called under RTNL semaphore + * or @dev_base_lock. If the name is found a pointer to the device + * is returned. If the name is not found then %NULL is returned. The + * reference counters are not incremented so the caller must be + * careful with locks. + */ + +struct net_device *__dev_get_by_name(const char *name) +{ + struct hlist_node *p; + + hlist_for_each(p, dev_name_hash(name)) { + struct net_device *dev + = hlist_entry(p, struct net_device, name_hlist); + if (!strncmp(dev->name, name, IFNAMSIZ)) + return dev; + } + return NULL; +} + +/** + * dev_get_by_name - find a device by its name + * @name: name to find + * + * Find an interface by name. This can be called from any + * context and does its own locking. The returned handle has + * the usage count incremented and the caller must use dev_put() to + * release it when it is no longer needed. %NULL is returned if no + * matching device is found. + */ + +struct net_device *dev_get_by_name(const char *name) +{ + struct net_device *dev; + + read_lock(&dev_base_lock); + dev = __dev_get_by_name(name); + if (dev) + dev_hold(dev); + read_unlock(&dev_base_lock); + return dev; +} + +/** + * __dev_get_by_index - find a device by its ifindex + * @ifindex: index of device + * + * Search for an interface by index. Returns %NULL if the device + * is not found or a pointer to the device. The device has not + * had its reference counter increased so the caller must be careful + * about locking. The caller must hold either the RTNL semaphore + * or @dev_base_lock. + */ + +struct net_device *__dev_get_by_index(int ifindex) +{ + struct hlist_node *p; + + hlist_for_each(p, dev_index_hash(ifindex)) { + struct net_device *dev + = hlist_entry(p, struct net_device, index_hlist); + if (dev->ifindex == ifindex) + return dev; + } + return NULL; +} + + +/** + * dev_get_by_index - find a device by its ifindex + * @ifindex: index of device + * + * Search for an interface by index. Returns NULL if the device + * is not found or a pointer to the device. The device returned has + * had a reference added and the pointer is safe until the user calls + * dev_put to indicate they have finished with it. + */ + +struct net_device *dev_get_by_index(int ifindex) +{ + struct net_device *dev; + + read_lock(&dev_base_lock); + dev = __dev_get_by_index(ifindex); + if (dev) + dev_hold(dev); + read_unlock(&dev_base_lock); + return dev; +} + +/** + * dev_getbyhwaddr - find a device by its hardware address + * @type: media type of device + * @ha: hardware address + * + * Search for an interface by MAC address. Returns NULL if the device + * is not found or a pointer to the device. The caller must hold the + * rtnl semaphore. The returned device has not had its ref count increased + * and the caller must therefore be careful about locking + * + * BUGS: + * If the API was consistent this would be __dev_get_by_hwaddr + */ + +struct net_device *dev_getbyhwaddr(unsigned short type, char *ha) +{ + struct net_device *dev; + + ASSERT_RTNL(); + + for (dev = dev_base; dev; dev = dev->next) + if (dev->type == type && + !memcmp(dev->dev_addr, ha, dev->addr_len)) + break; + return dev; +} + +struct net_device *dev_getfirstbyhwtype(unsigned short type) +{ + struct net_device *dev; + + rtnl_lock(); + for (dev = dev_base; dev; dev = dev->next) { + if (dev->type == type) { + dev_hold(dev); + break; + } + } + rtnl_unlock(); + return dev; +} + +EXPORT_SYMBOL(dev_getfirstbyhwtype); + +/** + * dev_get_by_flags - find any device with given flags + * @if_flags: IFF_* values + * @mask: bitmask of bits in if_flags to check + * + * Search for any interface with the given flags. Returns NULL if a device + * is not found or a pointer to the device. The device returned has + * had a reference added and the pointer is safe until the user calls + * dev_put to indicate they have finished with it. + */ + +struct net_device * dev_get_by_flags(unsigned short if_flags, unsigned short mask) +{ + struct net_device *dev; + + read_lock(&dev_base_lock); + for (dev = dev_base; dev != NULL; dev = dev->next) { + if (((dev->flags ^ if_flags) & mask) == 0) { + dev_hold(dev); + break; + } + } + read_unlock(&dev_base_lock); + return dev; +} + +/** + * dev_valid_name - check if name is okay for network device + * @name: name string + * + * Network device names need to be valid file names to + * to allow sysfs to work + */ +static int dev_valid_name(const char *name) +{ + return !(*name == '\0' + || !strcmp(name, ".") + || !strcmp(name, "..") + || strchr(name, '/')); +} + +/** + * dev_alloc_name - allocate a name for a device + * @dev: device + * @name: name format string + * + * Passed a format string - eg "lt%d" it will try and find a suitable + * id. Not efficient for many devices, not called a lot. The caller + * must hold the dev_base or rtnl lock while allocating the name and + * adding the device in order to avoid duplicates. Returns the number + * of the unit assigned or a negative errno code. + */ + +int dev_alloc_name(struct net_device *dev, const char *name) +{ + int i = 0; + char buf[IFNAMSIZ]; + const char *p; + const int max_netdevices = 8*PAGE_SIZE; + long *inuse; + struct net_device *d; + + p = strnchr(name, IFNAMSIZ-1, '%'); + if (p) { + /* + * Verify the string as this thing may have come from + * the user. There must be either one "%d" and no other "%" + * characters. + */ + if (p[1] != 'd' || strchr(p + 2, '%')) + return -EINVAL; + + /* Use one page as a bit array of possible slots */ + inuse = (long *) get_zeroed_page(GFP_ATOMIC); + if (!inuse) + return -ENOMEM; + + for (d = dev_base; d; d = d->next) { + if (!sscanf(d->name, name, &i)) + continue; + if (i < 0 || i >= max_netdevices) + continue; + + /* avoid cases where sscanf is not exact inverse of printf */ + snprintf(buf, sizeof(buf), name, i); + if (!strncmp(buf, d->name, IFNAMSIZ)) + set_bit(i, inuse); + } + + i = find_first_zero_bit(inuse, max_netdevices); + free_page((unsigned long) inuse); + } + + snprintf(buf, sizeof(buf), name, i); + if (!__dev_get_by_name(buf)) { + strlcpy(dev->name, buf, IFNAMSIZ); + return i; + } + + /* It is possible to run out of possible slots + * when the name is long and there isn't enough space left + * for the digits, or if all bits are used. + */ + return -ENFILE; +} + + +/** + * dev_change_name - change name of a device + * @dev: device + * @newname: name (or format string) must be at least IFNAMSIZ + * + * Change name of a device, can pass format strings "eth%d". + * for wildcarding. + */ +int dev_change_name(struct net_device *dev, char *newname) +{ + int err = 0; + + ASSERT_RTNL(); + + if (dev->flags & IFF_UP) + return -EBUSY; + + if (!dev_valid_name(newname)) + return -EINVAL; + + if (strchr(newname, '%')) { + err = dev_alloc_name(dev, newname); + if (err < 0) + return err; + strcpy(newname, dev->name); + } + else if (__dev_get_by_name(newname)) + return -EEXIST; + else + strlcpy(dev->name, newname, IFNAMSIZ); + + err = class_device_rename(&dev->class_dev, dev->name); + if (!err) { + hlist_del(&dev->name_hlist); + hlist_add_head(&dev->name_hlist, dev_name_hash(dev->name)); + notifier_call_chain(&netdev_chain, NETDEV_CHANGENAME, dev); + } + + return err; +} + +/** + * netdev_features_change - device changes fatures + * @dev: device to cause notification + * + * Called to indicate a device has changed features. + */ +void netdev_features_change(struct net_device *dev) +{ + notifier_call_chain(&netdev_chain, NETDEV_FEAT_CHANGE, dev); +} +EXPORT_SYMBOL(netdev_features_change); + +/** + * netdev_state_change - device changes state + * @dev: device to cause notification + * + * Called to indicate a device has changed state. This function calls + * the notifier chains for netdev_chain and sends a NEWLINK message + * to the routing socket. + */ +void netdev_state_change(struct net_device *dev) +{ + if (dev->flags & IFF_UP) { + notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev); + rtmsg_ifinfo(RTM_NEWLINK, dev, 0); + } +} + +/** + * dev_load - load a network module + * @name: name of interface + * + * If a network interface is not present and the process has suitable + * privileges this function loads the module. If module loading is not + * available in this kernel then it becomes a nop. + */ + +void dev_load(const char *name) +{ + struct net_device *dev; + + read_lock(&dev_base_lock); + dev = __dev_get_by_name(name); + read_unlock(&dev_base_lock); + + if (!dev && capable(CAP_SYS_MODULE)) + request_module("%s", name); +} + +static int default_rebuild_header(struct sk_buff *skb) +{ + printk(KERN_DEBUG "%s: default_rebuild_header called -- BUG!\n", + skb->dev ? skb->dev->name : "NULL!!!"); + kfree_skb(skb); + return 1; +} + + +/** + * dev_open - prepare an interface for use. + * @dev: device to open + * + * Takes a device from down to up state. The device's private open + * function is invoked and then the multicast lists are loaded. Finally + * the device is moved into the up state and a %NETDEV_UP message is + * sent to the netdev notifier chain. + * + * Calling this function on an active interface is a nop. On a failure + * a negative errno code is returned. + */ +int dev_open(struct net_device *dev) +{ + int ret = 0; + + /* + * Is it already up? + */ + + if (dev->flags & IFF_UP) + return 0; + + /* + * Is it even present? + */ + if (!netif_device_present(dev)) + return -ENODEV; + + /* + * Call device private open method + */ + set_bit(__LINK_STATE_START, &dev->state); + if (dev->open) { + ret = dev->open(dev); + if (ret) + clear_bit(__LINK_STATE_START, &dev->state); + } + + /* + * If it went open OK then: + */ + + if (!ret) { + /* + * Set the flags. + */ + dev->flags |= IFF_UP; + + /* + * Initialize multicasting status + */ + dev_mc_upload(dev); + + /* + * Wakeup transmit queue engine + */ + dev_activate(dev); + + /* + * ... and announce new interface. + */ + notifier_call_chain(&netdev_chain, NETDEV_UP, dev); + } + return ret; +} + +/** + * dev_close - shutdown an interface. + * @dev: device to shutdown + * + * This function moves an active device into down state. A + * %NETDEV_GOING_DOWN is sent to the netdev notifier chain. The device + * is then deactivated and finally a %NETDEV_DOWN is sent to the notifier + * chain. + */ +int dev_close(struct net_device *dev) +{ + if (!(dev->flags & IFF_UP)) + return 0; + + /* + * Tell people we are going down, so that they can + * prepare to death, when device is still operating. + */ + notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev); + + dev_deactivate(dev); + + clear_bit(__LINK_STATE_START, &dev->state); + + /* Synchronize to scheduled poll. We cannot touch poll list, + * it can be even on different cpu. So just clear netif_running(), + * and wait when poll really will happen. Actually, the best place + * for this is inside dev->stop() after device stopped its irq + * engine, but this requires more changes in devices. */ + + smp_mb__after_clear_bit(); /* Commit netif_running(). */ + while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) { + /* No hurry. */ + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(1); + } + + /* + * Call the device specific close. This cannot fail. + * Only if device is UP + * + * We allow it to be called even after a DETACH hot-plug + * event. + */ + if (dev->stop) + dev->stop(dev); + + /* + * Device is now down. + */ + + dev->flags &= ~IFF_UP; + + /* + * Tell people we are down + */ + notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev); + + return 0; +} + + +/* + * Device change register/unregister. These are not inline or static + * as we export them to the world. + */ + +/** + * register_netdevice_notifier - register a network notifier block + * @nb: notifier + * + * Register a notifier to be called when network device events occur. + * The notifier passed is linked into the kernel structures and must + * not be reused until it has been unregistered. A negative errno code + * is returned on a failure. + * + * When registered all registration and up events are replayed + * to the new notifier to allow device to have a race free + * view of the network device list. + */ + +int register_netdevice_notifier(struct notifier_block *nb) +{ + struct net_device *dev; + int err; + + rtnl_lock(); + err = notifier_chain_register(&netdev_chain, nb); + if (!err) { + for (dev = dev_base; dev; dev = dev->next) { + nb->notifier_call(nb, NETDEV_REGISTER, dev); + + if (dev->flags & IFF_UP) + nb->notifier_call(nb, NETDEV_UP, dev); + } + } + rtnl_unlock(); + return err; +} + +/** + * unregister_netdevice_notifier - unregister a network notifier block + * @nb: notifier + * + * Unregister a notifier previously registered by + * register_netdevice_notifier(). The notifier is unlinked into the + * kernel structures and may then be reused. A negative errno code + * is returned on a failure. + */ + +int unregister_netdevice_notifier(struct notifier_block *nb) +{ + return notifier_chain_unregister(&netdev_chain, nb); +} + +/** + * call_netdevice_notifiers - call all network notifier blocks + * @val: value passed unmodified to notifier function + * @v: pointer passed unmodified to notifier function + * + * Call all network notifier blocks. Parameters and return value + * are as for notifier_call_chain(). + */ + +int call_netdevice_notifiers(unsigned long val, void *v) +{ + return notifier_call_chain(&netdev_chain, val, v); +} + +/* When > 0 there are consumers of rx skb time stamps */ +static atomic_t netstamp_needed = ATOMIC_INIT(0); + +void net_enable_timestamp(void) +{ + atomic_inc(&netstamp_needed); +} + +void net_disable_timestamp(void) +{ + atomic_dec(&netstamp_needed); +} + +static inline void net_timestamp(struct timeval *stamp) +{ + if (atomic_read(&netstamp_needed)) + do_gettimeofday(stamp); + else { + stamp->tv_sec = 0; + stamp->tv_usec = 0; + } +} + +/* + * Support routine. Sends outgoing frames to any network + * taps currently in use. + */ + +void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev) +{ + struct packet_type *ptype; + net_timestamp(&skb->stamp); + + rcu_read_lock(); + list_for_each_entry_rcu(ptype, &ptype_all, list) { + /* Never send packets back to the socket + * they originated from - MvS (miquels@drinkel.ow.org) + */ + if ((ptype->dev == dev || !ptype->dev) && + (ptype->af_packet_priv == NULL || + (struct sock *)ptype->af_packet_priv != skb->sk)) { + struct sk_buff *skb2= skb_clone(skb, GFP_ATOMIC); + if (!skb2) + break; + + /* skb->nh should be correctly + set by sender, so that the second statement is + just protection against buggy protocols. + */ + skb2->mac.raw = skb2->data; + + if (skb2->nh.raw < skb2->data || + skb2->nh.raw > skb2->tail) { + if (net_ratelimit()) + printk(KERN_CRIT "protocol %04x is " + "buggy, dev %s\n", + skb2->protocol, dev->name); + skb2->nh.raw = skb2->data; + } + + skb2->h.raw = skb2->nh.raw; + skb2->pkt_type = PACKET_OUTGOING; + ptype->func(skb2, skb->dev, ptype); + } + } + rcu_read_unlock(); +} + +/* + * Invalidate hardware checksum when packet is to be mangled, and + * complete checksum manually on outgoing path. + */ +int skb_checksum_help(struct sk_buff *skb, int inward) +{ + unsigned int csum; + int ret = 0, offset = skb->h.raw - skb->data; + + if (inward) { + skb->ip_summed = CHECKSUM_NONE; + goto out; + } + + if (skb_cloned(skb)) { + ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); + if (ret) + goto out; + } + + if (offset > (int)skb->len) + BUG(); + csum = skb_checksum(skb, offset, skb->len-offset, 0); + + offset = skb->tail - skb->h.raw; + if (offset <= 0) + BUG(); + if (skb->csum + 2 > offset) + BUG(); + + *(u16*)(skb->h.raw + skb->csum) = csum_fold(csum); + skb->ip_summed = CHECKSUM_NONE; +out: + return ret; +} + +#ifdef CONFIG_HIGHMEM +/* Actually, we should eliminate this check as soon as we know, that: + * 1. IOMMU is present and allows to map all the memory. + * 2. No high memory really exists on this machine. + */ + +static inline int illegal_highdma(struct net_device *dev, struct sk_buff *skb) +{ + int i; + + if (dev->features & NETIF_F_HIGHDMA) + return 0; + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) + if (PageHighMem(skb_shinfo(skb)->frags[i].page)) + return 1; + + return 0; +} +#else +#define illegal_highdma(dev, skb) (0) +#endif + +extern void skb_release_data(struct sk_buff *); + +/* Keep head the same: replace data */ +int __skb_linearize(struct sk_buff *skb, int gfp_mask) +{ + unsigned int size; + u8 *data; + long offset; + struct skb_shared_info *ninfo; + int headerlen = skb->data - skb->head; + int expand = (skb->tail + skb->data_len) - skb->end; + + if (skb_shared(skb)) + BUG(); + + if (expand <= 0) + expand = 0; + + size = skb->end - skb->head + expand; + size = SKB_DATA_ALIGN(size); + data = kmalloc(size + sizeof(struct skb_shared_info), gfp_mask); + if (!data) + return -ENOMEM; + + /* Copy entire thing */ + if (skb_copy_bits(skb, -headerlen, data, headerlen + skb->len)) + BUG(); + + /* Set up shinfo */ + ninfo = (struct skb_shared_info*)(data + size); + atomic_set(&ninfo->dataref, 1); + ninfo->tso_size = skb_shinfo(skb)->tso_size; + ninfo->tso_segs = skb_shinfo(skb)->tso_segs; + ninfo->nr_frags = 0; + ninfo->frag_list = NULL; + + /* Offset between the two in bytes */ + offset = data - skb->head; + + /* Free old data. */ + skb_release_data(skb); + + skb->head = data; + skb->end = data + size; + + /* Set up new pointers */ + skb->h.raw += offset; + skb->nh.raw += offset; + skb->mac.raw += offset; + skb->tail += offset; + skb->data += offset; + + /* We are no longer a clone, even if we were. */ + skb->cloned = 0; + + skb->tail += skb->data_len; + skb->data_len = 0; + return 0; +} + +#define HARD_TX_LOCK(dev, cpu) { \ + if ((dev->features & NETIF_F_LLTX) == 0) { \ + spin_lock(&dev->xmit_lock); \ + dev->xmit_lock_owner = cpu; \ + } \ +} + +#define HARD_TX_UNLOCK(dev) { \ + if ((dev->features & NETIF_F_LLTX) == 0) { \ + dev->xmit_lock_owner = -1; \ + spin_unlock(&dev->xmit_lock); \ + } \ +} + +/** + * dev_queue_xmit - transmit a buffer + * @skb: buffer to transmit + * + * Queue a buffer for transmission to a network device. The caller must + * have set the device and priority and built the buffer before calling + * this function. The function can be called from an interrupt. + * + * A negative errno code is returned on a failure. A success does not + * guarantee the frame will be transmitted as it may be dropped due + * to congestion or traffic shaping. + * + * ----------------------------------------------------------------------------------- + * I notice this method can also return errors from the queue disciplines, + * including NET_XMIT_DROP, which is a positive value. So, errors can also + * be positive. + * + * Regardless of the return value, the skb is consumed, so it is currently + * difficult to retry a send to this method. (You can bump the ref count + * before sending to hold a reference for retry if you are careful.) + * + * When calling this method, interrupts MUST be enabled. This is because + * the BH enable code must have IRQs enabled so that it will not deadlock. + * --BLG + */ + +int dev_queue_xmit(struct sk_buff *skb) +{ + struct net_device *dev = skb->dev; + struct Qdisc *q; + int rc = -ENOMEM; + + if (skb_shinfo(skb)->frag_list && + !(dev->features & NETIF_F_FRAGLIST) && + __skb_linearize(skb, GFP_ATOMIC)) + goto out_kfree_skb; + + /* Fragmented skb is linearized if device does not support SG, + * or if at least one of fragments is in highmem and device + * does not support DMA from it. + */ + if (skb_shinfo(skb)->nr_frags && + (!(dev->features & NETIF_F_SG) || illegal_highdma(dev, skb)) && + __skb_linearize(skb, GFP_ATOMIC)) + goto out_kfree_skb; + + /* If packet is not checksummed and device does not support + * checksumming for this protocol, complete checksumming here. + */ + if (skb->ip_summed == CHECKSUM_HW && + (!(dev->features & (NETIF_F_HW_CSUM | NETIF_F_NO_CSUM)) && + (!(dev->features & NETIF_F_IP_CSUM) || + skb->protocol != htons(ETH_P_IP)))) + if (skb_checksum_help(skb, 0)) + goto out_kfree_skb; + + /* Disable soft irqs for various locks below. Also + * stops preemption for RCU. + */ + local_bh_disable(); + + /* Updates of qdisc are serialized by queue_lock. + * The struct Qdisc which is pointed to by qdisc is now a + * rcu structure - it may be accessed without acquiring + * a lock (but the structure may be stale.) The freeing of the + * qdisc will be deferred until it's known that there are no + * more references to it. + * + * If the qdisc has an enqueue function, we still need to + * hold the queue_lock before calling it, since queue_lock + * also serializes access to the device queue. + */ + + q = rcu_dereference(dev->qdisc); +#ifdef CONFIG_NET_CLS_ACT + skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_EGRESS); +#endif + if (q->enqueue) { + /* Grab device queue */ + spin_lock(&dev->queue_lock); + + rc = q->enqueue(skb, q); + + qdisc_run(dev); + + spin_unlock(&dev->queue_lock); + rc = rc == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : rc; + goto out; + } + + /* The device has no queue. Common case for software devices: + loopback, all the sorts of tunnels... + + Really, it is unlikely that xmit_lock protection is necessary here. + (f.e. loopback and IP tunnels are clean ignoring statistics + counters.) + However, it is possible, that they rely on protection + made by us here. + + Check this and shot the lock. It is not prone from deadlocks. + Either shot noqueue qdisc, it is even simpler 8) + */ + if (dev->flags & IFF_UP) { + int cpu = smp_processor_id(); /* ok because BHs are off */ + + if (dev->xmit_lock_owner != cpu) { + + HARD_TX_LOCK(dev, cpu); + + if (!netif_queue_stopped(dev)) { + if (netdev_nit) + dev_queue_xmit_nit(skb, dev); + + rc = 0; + if (!dev->hard_start_xmit(skb, dev)) { + HARD_TX_UNLOCK(dev); + goto out; + } + } + HARD_TX_UNLOCK(dev); + if (net_ratelimit()) + printk(KERN_CRIT "Virtual device %s asks to " + "queue packet!\n", dev->name); + } else { + /* Recursion is detected! It is possible, + * unfortunately */ + if (net_ratelimit()) + printk(KERN_CRIT "Dead loop on virtual device " + "%s, fix it urgently!\n", dev->name); + } + } + + rc = -ENETDOWN; + local_bh_enable(); + +out_kfree_skb: + kfree_skb(skb); + return rc; +out: + local_bh_enable(); + return rc; +} + + +/*======================================================================= + Receiver routines + =======================================================================*/ + +int netdev_max_backlog = 300; +int weight_p = 64; /* old backlog weight */ +/* These numbers are selected based on intuition and some + * experimentatiom, if you have more scientific way of doing this + * please go ahead and fix things. + */ +int no_cong_thresh = 10; +int no_cong = 20; +int lo_cong = 100; +int mod_cong = 290; + +DEFINE_PER_CPU(struct netif_rx_stats, netdev_rx_stat) = { 0, }; + + +static void get_sample_stats(int cpu) +{ +#ifdef RAND_LIE + unsigned long rd; + int rq; +#endif + struct softnet_data *sd = &per_cpu(softnet_data, cpu); + int blog = sd->input_pkt_queue.qlen; + int avg_blog = sd->avg_blog; + + avg_blog = (avg_blog >> 1) + (blog >> 1); + + if (avg_blog > mod_cong) { + /* Above moderate congestion levels. */ + sd->cng_level = NET_RX_CN_HIGH; +#ifdef RAND_LIE + rd = net_random(); + rq = rd % netdev_max_backlog; + if (rq < avg_blog) /* unlucky bastard */ + sd->cng_level = NET_RX_DROP; +#endif + } else if (avg_blog > lo_cong) { + sd->cng_level = NET_RX_CN_MOD; +#ifdef RAND_LIE + rd = net_random(); + rq = rd % netdev_max_backlog; + if (rq < avg_blog) /* unlucky bastard */ + sd->cng_level = NET_RX_CN_HIGH; +#endif + } else if (avg_blog > no_cong) + sd->cng_level = NET_RX_CN_LOW; + else /* no congestion */ + sd->cng_level = NET_RX_SUCCESS; + + sd->avg_blog = avg_blog; +} + +#ifdef OFFLINE_SAMPLE +static void sample_queue(unsigned long dummy) +{ +/* 10 ms 0r 1ms -- i don't care -- JHS */ + int next_tick = 1; + int cpu = smp_processor_id(); + + get_sample_stats(cpu); + next_tick += jiffies; + mod_timer(&samp_timer, next_tick); +} +#endif + + +/** + * netif_rx - post buffer to the network code + * @skb: buffer to post + * + * This function receives a packet from a device driver and queues it for + * the upper (protocol) levels to process. It always succeeds. The buffer + * may be dropped during processing for congestion control or by the + * protocol layers. + * + * return values: + * NET_RX_SUCCESS (no congestion) + * NET_RX_CN_LOW (low congestion) + * NET_RX_CN_MOD (moderate congestion) + * NET_RX_CN_HIGH (high congestion) + * NET_RX_DROP (packet was dropped) + * + */ + +int netif_rx(struct sk_buff *skb) +{ + int this_cpu; + struct softnet_data *queue; + unsigned long flags; + + /* if netpoll wants it, pretend we never saw it */ + if (netpoll_rx(skb)) + return NET_RX_DROP; + + if (!skb->stamp.tv_sec) + net_timestamp(&skb->stamp); + + /* + * The code is rearranged so that the path is the most + * short when CPU is congested, but is still operating. + */ + local_irq_save(flags); + this_cpu = smp_processor_id(); + queue = &__get_cpu_var(softnet_data); + + __get_cpu_var(netdev_rx_stat).total++; + if (queue->input_pkt_queue.qlen <= netdev_max_backlog) { + if (queue->input_pkt_queue.qlen) { + if (queue->throttle) + goto drop; + +enqueue: + dev_hold(skb->dev); + __skb_queue_tail(&queue->input_pkt_queue, skb); +#ifndef OFFLINE_SAMPLE + get_sample_stats(this_cpu); +#endif + local_irq_restore(flags); + return queue->cng_level; + } + + if (queue->throttle) + queue->throttle = 0; + + netif_rx_schedule(&queue->backlog_dev); + goto enqueue; + } + + if (!queue->throttle) { + queue->throttle = 1; + __get_cpu_var(netdev_rx_stat).throttled++; + } + +drop: + __get_cpu_var(netdev_rx_stat).dropped++; + local_irq_restore(flags); + + kfree_skb(skb); + return NET_RX_DROP; +} + +int netif_rx_ni(struct sk_buff *skb) +{ + int err; + + preempt_disable(); + err = netif_rx(skb); + if (local_softirq_pending()) + do_softirq(); + preempt_enable(); + + return err; +} + +EXPORT_SYMBOL(netif_rx_ni); + +static __inline__ void skb_bond(struct sk_buff *skb) +{ + struct net_device *dev = skb->dev; + + if (dev->master) { + skb->real_dev = skb->dev; + skb->dev = dev->master; + } +} + +static void net_tx_action(struct softirq_action *h) +{ + struct softnet_data *sd = &__get_cpu_var(softnet_data); + + if (sd->completion_queue) { + struct sk_buff *clist; + + local_irq_disable(); + clist = sd->completion_queue; + sd->completion_queue = NULL; + local_irq_enable(); + + while (clist) { + struct sk_buff *skb = clist; + clist = clist->next; + + BUG_TRAP(!atomic_read(&skb->users)); + __kfree_skb(skb); + } + } + + if (sd->output_queue) { + struct net_device *head; + + local_irq_disable(); + head = sd->output_queue; + sd->output_queue = NULL; + local_irq_enable(); + + while (head) { + struct net_device *dev = head; + head = head->next_sched; + + smp_mb__before_clear_bit(); + clear_bit(__LINK_STATE_SCHED, &dev->state); + + if (spin_trylock(&dev->queue_lock)) { + qdisc_run(dev); + spin_unlock(&dev->queue_lock); + } else { + netif_schedule(dev); + } + } + } +} + +static __inline__ int deliver_skb(struct sk_buff *skb, + struct packet_type *pt_prev) +{ + atomic_inc(&skb->users); + return pt_prev->func(skb, skb->dev, pt_prev); +} + +#if defined(CONFIG_BRIDGE) || defined (CONFIG_BRIDGE_MODULE) +int (*br_handle_frame_hook)(struct net_bridge_port *p, struct sk_buff **pskb); +struct net_bridge; +struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br, + unsigned char *addr); +void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent); + +static __inline__ int handle_bridge(struct sk_buff **pskb, + struct packet_type **pt_prev, int *ret) +{ + struct net_bridge_port *port; + + if ((*pskb)->pkt_type == PACKET_LOOPBACK || + (port = rcu_dereference((*pskb)->dev->br_port)) == NULL) + return 0; + + if (*pt_prev) { + *ret = deliver_skb(*pskb, *pt_prev); + *pt_prev = NULL; + } + + return br_handle_frame_hook(port, pskb); +} +#else +#define handle_bridge(skb, pt_prev, ret) (0) +#endif + +#ifdef CONFIG_NET_CLS_ACT +/* TODO: Maybe we should just force sch_ingress to be compiled in + * when CONFIG_NET_CLS_ACT is? otherwise some useless instructions + * a compare and 2 stores extra right now if we dont have it on + * but have CONFIG_NET_CLS_ACT + * NOTE: This doesnt stop any functionality; if you dont have + * the ingress scheduler, you just cant add policies on ingress. + * + */ +static int ing_filter(struct sk_buff *skb) +{ + struct Qdisc *q; + struct net_device *dev = skb->dev; + int result = TC_ACT_OK; + + if (dev->qdisc_ingress) { + __u32 ttl = (__u32) G_TC_RTTL(skb->tc_verd); + if (MAX_RED_LOOP < ttl++) { + printk("Redir loop detected Dropping packet (%s->%s)\n", + skb->input_dev?skb->input_dev->name:"??",skb->dev->name); + return TC_ACT_SHOT; + } + + skb->tc_verd = SET_TC_RTTL(skb->tc_verd,ttl); + + skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_INGRESS); + if (NULL == skb->input_dev) { + skb->input_dev = skb->dev; + printk("ing_filter: fixed %s out %s\n",skb->input_dev->name,skb->dev->name); + } + spin_lock(&dev->ingress_lock); + if ((q = dev->qdisc_ingress) != NULL) + result = q->enqueue(skb, q); + spin_unlock(&dev->ingress_lock); + + } + + return result; +} +#endif + +int netif_receive_skb(struct sk_buff *skb) +{ + struct packet_type *ptype, *pt_prev; + int ret = NET_RX_DROP; + unsigned short type; + + /* if we've gotten here through NAPI, check netpoll */ + if (skb->dev->poll && netpoll_rx(skb)) + return NET_RX_DROP; + + if (!skb->stamp.tv_sec) + net_timestamp(&skb->stamp); + + skb_bond(skb); + + __get_cpu_var(netdev_rx_stat).total++; + + skb->h.raw = skb->nh.raw = skb->data; + skb->mac_len = skb->nh.raw - skb->mac.raw; + + pt_prev = NULL; + + rcu_read_lock(); + +#ifdef CONFIG_NET_CLS_ACT + if (skb->tc_verd & TC_NCLS) { + skb->tc_verd = CLR_TC_NCLS(skb->tc_verd); + goto ncls; + } +#endif + + list_for_each_entry_rcu(ptype, &ptype_all, list) { + if (!ptype->dev || ptype->dev == skb->dev) { + if (pt_prev) + ret = deliver_skb(skb, pt_prev); + pt_prev = ptype; + } + } + +#ifdef CONFIG_NET_CLS_ACT + if (pt_prev) { + ret = deliver_skb(skb, pt_prev); + pt_prev = NULL; /* noone else should process this after*/ + } else { + skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd); + } + + ret = ing_filter(skb); + + if (ret == TC_ACT_SHOT || (ret == TC_ACT_STOLEN)) { + kfree_skb(skb); + goto out; + } + + skb->tc_verd = 0; +ncls: +#endif + + handle_diverter(skb); + + if (handle_bridge(&skb, &pt_prev, &ret)) + goto out; + + type = skb->protocol; + list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type)&15], list) { + if (ptype->type == type && + (!ptype->dev || ptype->dev == skb->dev)) { + if (pt_prev) + ret = deliver_skb(skb, pt_prev); + pt_prev = ptype; + } + } + + if (pt_prev) { + ret = pt_prev->func(skb, skb->dev, pt_prev); + } else { + kfree_skb(skb); + /* Jamal, now you will not able to escape explaining + * me how you were going to use this. :-) + */ + ret = NET_RX_DROP; + } + +out: + rcu_read_unlock(); + return ret; +} + +static int process_backlog(struct net_device *backlog_dev, int *budget) +{ + int work = 0; + int quota = min(backlog_dev->quota, *budget); + struct softnet_data *queue = &__get_cpu_var(softnet_data); + unsigned long start_time = jiffies; + + backlog_dev->weight = weight_p; + for (;;) { + struct sk_buff *skb; + struct net_device *dev; + + local_irq_disable(); + skb = __skb_dequeue(&queue->input_pkt_queue); + if (!skb) + goto job_done; + local_irq_enable(); + + dev = skb->dev; + + netif_receive_skb(skb); + + dev_put(dev); + + work++; + + if (work >= quota || jiffies - start_time > 1) + break; + + } + + backlog_dev->quota -= work; + *budget -= work; + return -1; + +job_done: + backlog_dev->quota -= work; + *budget -= work; + + list_del(&backlog_dev->poll_list); + smp_mb__before_clear_bit(); + netif_poll_enable(backlog_dev); + + if (queue->throttle) + queue->throttle = 0; + local_irq_enable(); + return 0; +} + +static void net_rx_action(struct softirq_action *h) +{ + struct softnet_data *queue = &__get_cpu_var(softnet_data); + unsigned long start_time = jiffies; + int budget = netdev_max_backlog; + + + local_irq_disable(); + + while (!list_empty(&queue->poll_list)) { + struct net_device *dev; + + if (budget <= 0 || jiffies - start_time > 1) + goto softnet_break; + + local_irq_enable(); + + dev = list_entry(queue->poll_list.next, + struct net_device, poll_list); + netpoll_poll_lock(dev); + + if (dev->quota <= 0 || dev->poll(dev, &budget)) { + netpoll_poll_unlock(dev); + local_irq_disable(); + list_del(&dev->poll_list); + list_add_tail(&dev->poll_list, &queue->poll_list); + if (dev->quota < 0) + dev->quota += dev->weight; + else + dev->quota = dev->weight; + } else { + netpoll_poll_unlock(dev); + dev_put(dev); + local_irq_disable(); + } + } +out: + local_irq_enable(); + return; + +softnet_break: + __get_cpu_var(netdev_rx_stat).time_squeeze++; + __raise_softirq_irqoff(NET_RX_SOFTIRQ); + goto out; +} + +static gifconf_func_t * gifconf_list [NPROTO]; + +/** + * register_gifconf - register a SIOCGIF handler + * @family: Address family + * @gifconf: Function handler + * + * Register protocol dependent address dumping routines. The handler + * that is passed must not be freed or reused until it has been replaced + * by another handler. + */ +int register_gifconf(unsigned int family, gifconf_func_t * gifconf) +{ + if (family >= NPROTO) + return -EINVAL; + gifconf_list[family] = gifconf; + return 0; +} + + +/* + * Map an interface index to its name (SIOCGIFNAME) + */ + +/* + * We need this ioctl for efficient implementation of the + * if_indextoname() function required by the IPv6 API. Without + * it, we would have to search all the interfaces to find a + * match. --pb + */ + +static int dev_ifname(struct ifreq __user *arg) +{ + struct net_device *dev; + struct ifreq ifr; + + /* + * Fetch the caller's info block. + */ + + if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) + return -EFAULT; + + read_lock(&dev_base_lock); + dev = __dev_get_by_index(ifr.ifr_ifindex); + if (!dev) { + read_unlock(&dev_base_lock); + return -ENODEV; + } + + strcpy(ifr.ifr_name, dev->name); + read_unlock(&dev_base_lock); + + if (copy_to_user(arg, &ifr, sizeof(struct ifreq))) + return -EFAULT; + return 0; +} + +/* + * Perform a SIOCGIFCONF call. This structure will change + * size eventually, and there is nothing I can do about it. + * Thus we will need a 'compatibility mode'. + */ + +static int dev_ifconf(char __user *arg) +{ + struct ifconf ifc; + struct net_device *dev; + char __user *pos; + int len; + int total; + int i; + + /* + * Fetch the caller's info block. + */ + + if (copy_from_user(&ifc, arg, sizeof(struct ifconf))) + return -EFAULT; + + pos = ifc.ifc_buf; + len = ifc.ifc_len; + + /* + * Loop over the interfaces, and write an info block for each. + */ + + total = 0; + for (dev = dev_base; dev; dev = dev->next) { + for (i = 0; i < NPROTO; i++) { + if (gifconf_list[i]) { + int done; + if (!pos) + done = gifconf_list[i](dev, NULL, 0); + else + done = gifconf_list[i](dev, pos + total, + len - total); + if (done < 0) + return -EFAULT; + total += done; + } + } + } + + /* + * All done. Write the updated control block back to the caller. + */ + ifc.ifc_len = total; + + /* + * Both BSD and Solaris return 0 here, so we do too. + */ + return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0; +} + +#ifdef CONFIG_PROC_FS +/* + * This is invoked by the /proc filesystem handler to display a device + * in detail. + */ +static __inline__ struct net_device *dev_get_idx(loff_t pos) +{ + struct net_device *dev; + loff_t i; + + for (i = 0, dev = dev_base; dev && i < pos; ++i, dev = dev->next); + + return i == pos ? dev : NULL; +} + +void *dev_seq_start(struct seq_file *seq, loff_t *pos) +{ + read_lock(&dev_base_lock); + return *pos ? dev_get_idx(*pos - 1) : SEQ_START_TOKEN; +} + +void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + ++*pos; + return v == SEQ_START_TOKEN ? dev_base : ((struct net_device *)v)->next; +} + +void dev_seq_stop(struct seq_file *seq, void *v) +{ + read_unlock(&dev_base_lock); +} + +static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev) +{ + if (dev->get_stats) { + struct net_device_stats *stats = dev->get_stats(dev); + + seq_printf(seq, "%6s:%8lu %7lu %4lu %4lu %4lu %5lu %10lu %9lu " + "%8lu %7lu %4lu %4lu %4lu %5lu %7lu %10lu\n", + dev->name, stats->rx_bytes, stats->rx_packets, + stats->rx_errors, + stats->rx_dropped + stats->rx_missed_errors, + stats->rx_fifo_errors, + stats->rx_length_errors + stats->rx_over_errors + + stats->rx_crc_errors + stats->rx_frame_errors, + stats->rx_compressed, stats->multicast, + stats->tx_bytes, stats->tx_packets, + stats->tx_errors, stats->tx_dropped, + stats->tx_fifo_errors, stats->collisions, + stats->tx_carrier_errors + + stats->tx_aborted_errors + + stats->tx_window_errors + + stats->tx_heartbeat_errors, + stats->tx_compressed); + } else + seq_printf(seq, "%6s: No statistics available.\n", dev->name); +} + +/* + * Called from the PROCfs module. This now uses the new arbitrary sized + * /proc/net interface to create /proc/net/dev + */ +static int dev_seq_show(struct seq_file *seq, void *v) +{ + if (v == SEQ_START_TOKEN) + seq_puts(seq, "Inter-| Receive " + " | Transmit\n" + " face |bytes packets errs drop fifo frame " + "compressed multicast|bytes packets errs " + "drop fifo colls carrier compressed\n"); + else + dev_seq_printf_stats(seq, v); + return 0; +} + +static struct netif_rx_stats *softnet_get_online(loff_t *pos) +{ + struct netif_rx_stats *rc = NULL; + + while (*pos < NR_CPUS) + if (cpu_online(*pos)) { + rc = &per_cpu(netdev_rx_stat, *pos); + break; + } else + ++*pos; + return rc; +} + +static void *softnet_seq_start(struct seq_file *seq, loff_t *pos) +{ + return softnet_get_online(pos); +} + +static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + ++*pos; + return softnet_get_online(pos); +} + +static void softnet_seq_stop(struct seq_file *seq, void *v) +{ +} + +static int softnet_seq_show(struct seq_file *seq, void *v) +{ + struct netif_rx_stats *s = v; + + seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", + s->total, s->dropped, s->time_squeeze, s->throttled, + s->fastroute_hit, s->fastroute_success, s->fastroute_defer, + s->fastroute_deferred_out, +#if 0 + s->fastroute_latency_reduction +#else + s->cpu_collision +#endif + ); + return 0; +} + +static struct seq_operations dev_seq_ops = { + .start = dev_seq_start, + .next = dev_seq_next, + .stop = dev_seq_stop, + .show = dev_seq_show, +}; + +static int dev_seq_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &dev_seq_ops); +} + +static struct file_operations dev_seq_fops = { + .owner = THIS_MODULE, + .open = dev_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static struct seq_operations softnet_seq_ops = { + .start = softnet_seq_start, + .next = softnet_seq_next, + .stop = softnet_seq_stop, + .show = softnet_seq_show, +}; + +static int softnet_seq_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &softnet_seq_ops); +} + +static struct file_operations softnet_seq_fops = { + .owner = THIS_MODULE, + .open = softnet_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +#ifdef WIRELESS_EXT +extern int wireless_proc_init(void); +#else +#define wireless_proc_init() 0 +#endif + +static int __init dev_proc_init(void) +{ + int rc = -ENOMEM; + + if (!proc_net_fops_create("dev", S_IRUGO, &dev_seq_fops)) + goto out; + if (!proc_net_fops_create("softnet_stat", S_IRUGO, &softnet_seq_fops)) + goto out_dev; + if (wireless_proc_init()) + goto out_softnet; + rc = 0; +out: + return rc; +out_softnet: + proc_net_remove("softnet_stat"); +out_dev: + proc_net_remove("dev"); + goto out; +} +#else +#define dev_proc_init() 0 +#endif /* CONFIG_PROC_FS */ + + +/** + * netdev_set_master - set up master/slave pair + * @slave: slave device + * @master: new master device + * + * Changes the master device of the slave. Pass %NULL to break the + * bonding. The caller must hold the RTNL semaphore. On a failure + * a negative errno code is returned. On success the reference counts + * are adjusted, %RTM_NEWLINK is sent to the routing socket and the + * function returns zero. + */ +int netdev_set_master(struct net_device *slave, struct net_device *master) +{ + struct net_device *old = slave->master; + + ASSERT_RTNL(); + + if (master) { + if (old) + return -EBUSY; + dev_hold(master); + } + + slave->master = master; + + synchronize_net(); + + if (old) + dev_put(old); + + if (master) + slave->flags |= IFF_SLAVE; + else + slave->flags &= ~IFF_SLAVE; + + rtmsg_ifinfo(RTM_NEWLINK, slave, IFF_SLAVE); + return 0; +} + +/** + * dev_set_promiscuity - update promiscuity count on a device + * @dev: device + * @inc: modifier + * + * Add or remove promsicuity from a device. While the count in the device + * remains above zero the interface remains promiscuous. Once it hits zero + * the device reverts back to normal filtering operation. A negative inc + * value is used to drop promiscuity on the device. + */ +void dev_set_promiscuity(struct net_device *dev, int inc) +{ + unsigned short old_flags = dev->flags; + + dev->flags |= IFF_PROMISC; + if ((dev->promiscuity += inc) == 0) + dev->flags &= ~IFF_PROMISC; + if (dev->flags ^ old_flags) { + dev_mc_upload(dev); + printk(KERN_INFO "device %s %s promiscuous mode\n", + dev->name, (dev->flags & IFF_PROMISC) ? "entered" : + "left"); + } +} + +/** + * dev_set_allmulti - update allmulti count on a device + * @dev: device + * @inc: modifier + * + * Add or remove reception of all multicast frames to a device. While the + * count in the device remains above zero the interface remains listening + * to all interfaces. Once it hits zero the device reverts back to normal + * filtering operation. A negative @inc value is used to drop the counter + * when releasing a resource needing all multicasts. + */ + +void dev_set_allmulti(struct net_device *dev, int inc) +{ + unsigned short old_flags = dev->flags; + + dev->flags |= IFF_ALLMULTI; + if ((dev->allmulti += inc) == 0) + dev->flags &= ~IFF_ALLMULTI; + if (dev->flags ^ old_flags) + dev_mc_upload(dev); +} + +unsigned dev_get_flags(const struct net_device *dev) +{ + unsigned flags; + + flags = (dev->flags & ~(IFF_PROMISC | + IFF_ALLMULTI | + IFF_RUNNING)) | + (dev->gflags & (IFF_PROMISC | + IFF_ALLMULTI)); + + if (netif_running(dev) && netif_carrier_ok(dev)) + flags |= IFF_RUNNING; + + return flags; +} + +int dev_change_flags(struct net_device *dev, unsigned flags) +{ + int ret; + int old_flags = dev->flags; + + /* + * Set the flags on our device. + */ + + dev->flags = (flags & (IFF_DEBUG | IFF_NOTRAILERS | IFF_NOARP | + IFF_DYNAMIC | IFF_MULTICAST | IFF_PORTSEL | + IFF_AUTOMEDIA)) | + (dev->flags & (IFF_UP | IFF_VOLATILE | IFF_PROMISC | + IFF_ALLMULTI)); + + /* + * Load in the correct multicast list now the flags have changed. + */ + + dev_mc_upload(dev); + + /* + * Have we downed the interface. We handle IFF_UP ourselves + * according to user attempts to set it, rather than blindly + * setting it. + */ + + ret = 0; + if ((old_flags ^ flags) & IFF_UP) { /* Bit is different ? */ + ret = ((old_flags & IFF_UP) ? dev_close : dev_open)(dev); + + if (!ret) + dev_mc_upload(dev); + } + + if (dev->flags & IFF_UP && + ((old_flags ^ dev->flags) &~ (IFF_UP | IFF_PROMISC | IFF_ALLMULTI | + IFF_VOLATILE))) + notifier_call_chain(&netdev_chain, NETDEV_CHANGE, dev); + + if ((flags ^ dev->gflags) & IFF_PROMISC) { + int inc = (flags & IFF_PROMISC) ? +1 : -1; + dev->gflags ^= IFF_PROMISC; + dev_set_promiscuity(dev, inc); + } + + /* NOTE: order of synchronization of IFF_PROMISC and IFF_ALLMULTI + is important. Some (broken) drivers set IFF_PROMISC, when + IFF_ALLMULTI is requested not asking us and not reporting. + */ + if ((flags ^ dev->gflags) & IFF_ALLMULTI) { + int inc = (flags & IFF_ALLMULTI) ? +1 : -1; + dev->gflags ^= IFF_ALLMULTI; + dev_set_allmulti(dev, inc); + } + + if (old_flags ^ dev->flags) + rtmsg_ifinfo(RTM_NEWLINK, dev, old_flags ^ dev->flags); + + return ret; +} + +int dev_set_mtu(struct net_device *dev, int new_mtu) +{ + int err; + + if (new_mtu == dev->mtu) + return 0; + + /* MTU must be positive. */ + if (new_mtu < 0) + return -EINVAL; + + if (!netif_device_present(dev)) + return -ENODEV; + + err = 0; + if (dev->change_mtu) + err = dev->change_mtu(dev, new_mtu); + else + dev->mtu = new_mtu; + if (!err && dev->flags & IFF_UP) + notifier_call_chain(&netdev_chain, + NETDEV_CHANGEMTU, dev); + return err; +} + +int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa) +{ + int err; + + if (!dev->set_mac_address) + return -EOPNOTSUPP; + if (sa->sa_family != dev->type) + return -EINVAL; + if (!netif_device_present(dev)) + return -ENODEV; + err = dev->set_mac_address(dev, sa); + if (!err) + notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev); + return err; +} + +/* + * Perform the SIOCxIFxxx calls. + */ +static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd) +{ + int err; + struct net_device *dev = __dev_get_by_name(ifr->ifr_name); + + if (!dev) + return -ENODEV; + + switch (cmd) { + case SIOCGIFFLAGS: /* Get interface flags */ + ifr->ifr_flags = dev_get_flags(dev); + return 0; + + case SIOCSIFFLAGS: /* Set interface flags */ + return dev_change_flags(dev, ifr->ifr_flags); + + case SIOCGIFMETRIC: /* Get the metric on the interface + (currently unused) */ + ifr->ifr_metric = 0; + return 0; + + case SIOCSIFMETRIC: /* Set the metric on the interface + (currently unused) */ + return -EOPNOTSUPP; + + case SIOCGIFMTU: /* Get the MTU of a device */ + ifr->ifr_mtu = dev->mtu; + return 0; + + case SIOCSIFMTU: /* Set the MTU of a device */ + return dev_set_mtu(dev, ifr->ifr_mtu); + + case SIOCGIFHWADDR: + if (!dev->addr_len) + memset(ifr->ifr_hwaddr.sa_data, 0, sizeof ifr->ifr_hwaddr.sa_data); + else + memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr, + min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len)); + ifr->ifr_hwaddr.sa_family = dev->type; + return 0; + + case SIOCSIFHWADDR: + return dev_set_mac_address(dev, &ifr->ifr_hwaddr); + + case SIOCSIFHWBROADCAST: + if (ifr->ifr_hwaddr.sa_family != dev->type) + return -EINVAL; + memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, + min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len)); + notifier_call_chain(&netdev_chain, + NETDEV_CHANGEADDR, dev); + return 0; + + case SIOCGIFMAP: + ifr->ifr_map.mem_start = dev->mem_start; + ifr->ifr_map.mem_end = dev->mem_end; + ifr->ifr_map.base_addr = dev->base_addr; + ifr->ifr_map.irq = dev->irq; + ifr->ifr_map.dma = dev->dma; + ifr->ifr_map.port = dev->if_port; + return 0; + + case SIOCSIFMAP: + if (dev->set_config) { + if (!netif_device_present(dev)) + return -ENODEV; + return dev->set_config(dev, &ifr->ifr_map); + } + return -EOPNOTSUPP; + + case SIOCADDMULTI: + if (!dev->set_multicast_list || + ifr->ifr_hwaddr.sa_family != AF_UNSPEC) + return -EINVAL; + if (!netif_device_present(dev)) + return -ENODEV; + return dev_mc_add(dev, ifr->ifr_hwaddr.sa_data, + dev->addr_len, 1); + + case SIOCDELMULTI: + if (!dev->set_multicast_list || + ifr->ifr_hwaddr.sa_family != AF_UNSPEC) + return -EINVAL; + if (!netif_device_present(dev)) + return -ENODEV; + return dev_mc_delete(dev, ifr->ifr_hwaddr.sa_data, + dev->addr_len, 1); + + case SIOCGIFINDEX: + ifr->ifr_ifindex = dev->ifindex; + return 0; + + case SIOCGIFTXQLEN: + ifr->ifr_qlen = dev->tx_queue_len; + return 0; + + case SIOCSIFTXQLEN: + if (ifr->ifr_qlen < 0) + return -EINVAL; + dev->tx_queue_len = ifr->ifr_qlen; + return 0; + + case SIOCSIFNAME: + ifr->ifr_newname[IFNAMSIZ-1] = '\0'; + return dev_change_name(dev, ifr->ifr_newname); + + /* + * Unknown or private ioctl + */ + + default: + if ((cmd >= SIOCDEVPRIVATE && + cmd <= SIOCDEVPRIVATE + 15) || + cmd == SIOCBONDENSLAVE || + cmd == SIOCBONDRELEASE || + cmd == SIOCBONDSETHWADDR || + cmd == SIOCBONDSLAVEINFOQUERY || + cmd == SIOCBONDINFOQUERY || + cmd == SIOCBONDCHANGEACTIVE || + cmd == SIOCGMIIPHY || + cmd == SIOCGMIIREG || + cmd == SIOCSMIIREG || + cmd == SIOCBRADDIF || + cmd == SIOCBRDELIF || + cmd == SIOCWANDEV) { + err = -EOPNOTSUPP; + if (dev->do_ioctl) { + if (netif_device_present(dev)) + err = dev->do_ioctl(dev, ifr, + cmd); + else + err = -ENODEV; + } + } else + err = -EINVAL; + + } + return err; +} + +/* + * This function handles all "interface"-type I/O control requests. The actual + * 'doing' part of this is dev_ifsioc above. + */ + +/** + * dev_ioctl - network device ioctl + * @cmd: command to issue + * @arg: pointer to a struct ifreq in user space + * + * Issue ioctl functions to devices. This is normally called by the + * user space syscall interfaces but can sometimes be useful for + * other purposes. The return value is the return from the syscall if + * positive or a negative errno code on error. + */ + +int dev_ioctl(unsigned int cmd, void __user *arg) +{ + struct ifreq ifr; + int ret; + char *colon; + + /* One special case: SIOCGIFCONF takes ifconf argument + and requires shared lock, because it sleeps writing + to user space. + */ + + if (cmd == SIOCGIFCONF) { + rtnl_shlock(); + ret = dev_ifconf((char __user *) arg); + rtnl_shunlock(); + return ret; + } + if (cmd == SIOCGIFNAME) + return dev_ifname((struct ifreq __user *)arg); + + if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) + return -EFAULT; + + ifr.ifr_name[IFNAMSIZ-1] = 0; + + colon = strchr(ifr.ifr_name, ':'); + if (colon) + *colon = 0; + + /* + * See which interface the caller is talking about. + */ + + switch (cmd) { + /* + * These ioctl calls: + * - can be done by all. + * - atomic and do not require locking. + * - return a value + */ + case SIOCGIFFLAGS: + case SIOCGIFMETRIC: + case SIOCGIFMTU: + case SIOCGIFHWADDR: + case SIOCGIFSLAVE: + case SIOCGIFMAP: + case SIOCGIFINDEX: + case SIOCGIFTXQLEN: + dev_load(ifr.ifr_name); + read_lock(&dev_base_lock); + ret = dev_ifsioc(&ifr, cmd); + read_unlock(&dev_base_lock); + if (!ret) { + if (colon) + *colon = ':'; + if (copy_to_user(arg, &ifr, + sizeof(struct ifreq))) + ret = -EFAULT; + } + return ret; + + case SIOCETHTOOL: + dev_load(ifr.ifr_name); + rtnl_lock(); + ret = dev_ethtool(&ifr); + rtnl_unlock(); + if (!ret) { + if (colon) + *colon = ':'; + if (copy_to_user(arg, &ifr, + sizeof(struct ifreq))) + ret = -EFAULT; + } + return ret; + + /* + * These ioctl calls: + * - require superuser power. + * - require strict serialization. + * - return a value + */ + case SIOCGMIIPHY: + case SIOCGMIIREG: + case SIOCSIFNAME: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + dev_load(ifr.ifr_name); + rtnl_lock(); + ret = dev_ifsioc(&ifr, cmd); + rtnl_unlock(); + if (!ret) { + if (colon) + *colon = ':'; + if (copy_to_user(arg, &ifr, + sizeof(struct ifreq))) + ret = -EFAULT; + } + return ret; + + /* + * These ioctl calls: + * - require superuser power. + * - require strict serialization. + * - do not return a value + */ + case SIOCSIFFLAGS: + case SIOCSIFMETRIC: + case SIOCSIFMTU: + case SIOCSIFMAP: + case SIOCSIFHWADDR: + case SIOCSIFSLAVE: + case SIOCADDMULTI: + case SIOCDELMULTI: + case SIOCSIFHWBROADCAST: + case SIOCSIFTXQLEN: + case SIOCSMIIREG: + case SIOCBONDENSLAVE: + case SIOCBONDRELEASE: + case SIOCBONDSETHWADDR: + case SIOCBONDSLAVEINFOQUERY: + case SIOCBONDINFOQUERY: + case SIOCBONDCHANGEACTIVE: + case SIOCBRADDIF: + case SIOCBRDELIF: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + dev_load(ifr.ifr_name); + rtnl_lock(); + ret = dev_ifsioc(&ifr, cmd); + rtnl_unlock(); + return ret; + + case SIOCGIFMEM: + /* Get the per device memory space. We can add this but + * currently do not support it */ + case SIOCSIFMEM: + /* Set the per device memory buffer space. + * Not applicable in our case */ + case SIOCSIFLINK: + return -EINVAL; + + /* + * Unknown or private ioctl. + */ + default: + if (cmd == SIOCWANDEV || + (cmd >= SIOCDEVPRIVATE && + cmd <= SIOCDEVPRIVATE + 15)) { + dev_load(ifr.ifr_name); + rtnl_lock(); + ret = dev_ifsioc(&ifr, cmd); + rtnl_unlock(); + if (!ret && copy_to_user(arg, &ifr, + sizeof(struct ifreq))) + ret = -EFAULT; + return ret; + } +#ifdef WIRELESS_EXT + /* Take care of Wireless Extensions */ + if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { + /* If command is `set a parameter', or + * `get the encoding parameters', check if + * the user has the right to do it */ + if (IW_IS_SET(cmd) || cmd == SIOCGIWENCODE) { + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + } + dev_load(ifr.ifr_name); + rtnl_lock(); + /* Follow me in net/core/wireless.c */ + ret = wireless_process_ioctl(&ifr, cmd); + rtnl_unlock(); + if (IW_IS_GET(cmd) && + copy_to_user(arg, &ifr, + sizeof(struct ifreq))) + ret = -EFAULT; + return ret; + } +#endif /* WIRELESS_EXT */ + return -EINVAL; + } +} + + +/** + * dev_new_index - allocate an ifindex + * + * Returns a suitable unique value for a new device interface + * number. The caller must hold the rtnl semaphore or the + * dev_base_lock to be sure it remains unique. + */ +static int dev_new_index(void) +{ + static int ifindex; + for (;;) { + if (++ifindex <= 0) + ifindex = 1; + if (!__dev_get_by_index(ifindex)) + return ifindex; + } +} + +static int dev_boot_phase = 1; + +/* Delayed registration/unregisteration */ +static DEFINE_SPINLOCK(net_todo_list_lock); +static struct list_head net_todo_list = LIST_HEAD_INIT(net_todo_list); + +static inline void net_set_todo(struct net_device *dev) +{ + spin_lock(&net_todo_list_lock); + list_add_tail(&dev->todo_list, &net_todo_list); + spin_unlock(&net_todo_list_lock); +} + +/** + * register_netdevice - register a network device + * @dev: device to register + * + * Take a completed network device structure and add it to the kernel + * interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier + * chain. 0 is returned on success. A negative errno code is returned + * on a failure to set up the device, or if the name is a duplicate. + * + * Callers must hold the rtnl semaphore. You may want + * register_netdev() instead of this. + * + * BUGS: + * The locking appears insufficient to guarantee two parallel registers + * will not get the same name. + */ + +int register_netdevice(struct net_device *dev) +{ + struct hlist_head *head; + struct hlist_node *p; + int ret; + + BUG_ON(dev_boot_phase); + ASSERT_RTNL(); + + /* When net_device's are persistent, this will be fatal. */ + BUG_ON(dev->reg_state != NETREG_UNINITIALIZED); + + spin_lock_init(&dev->queue_lock); + spin_lock_init(&dev->xmit_lock); + dev->xmit_lock_owner = -1; +#ifdef CONFIG_NET_CLS_ACT + spin_lock_init(&dev->ingress_lock); +#endif + + ret = alloc_divert_blk(dev); + if (ret) + goto out; + + dev->iflink = -1; + + /* Init, if this function is available */ + if (dev->init) { + ret = dev->init(dev); + if (ret) { + if (ret > 0) + ret = -EIO; + goto out_err; + } + } + + if (!dev_valid_name(dev->name)) { + ret = -EINVAL; + goto out_err; + } + + dev->ifindex = dev_new_index(); + if (dev->iflink == -1) + dev->iflink = dev->ifindex; + + /* Check for existence of name */ + head = dev_name_hash(dev->name); + hlist_for_each(p, head) { + struct net_device *d + = hlist_entry(p, struct net_device, name_hlist); + if (!strncmp(d->name, dev->name, IFNAMSIZ)) { + ret = -EEXIST; + goto out_err; + } + } + + /* Fix illegal SG+CSUM combinations. */ + if ((dev->features & NETIF_F_SG) && + !(dev->features & (NETIF_F_IP_CSUM | + NETIF_F_NO_CSUM | + NETIF_F_HW_CSUM))) { + printk("%s: Dropping NETIF_F_SG since no checksum feature.\n", + dev->name); + dev->features &= ~NETIF_F_SG; + } + + /* TSO requires that SG is present as well. */ + if ((dev->features & NETIF_F_TSO) && + !(dev->features & NETIF_F_SG)) { + printk("%s: Dropping NETIF_F_TSO since no SG feature.\n", + dev->name); + dev->features &= ~NETIF_F_TSO; + } + + /* + * nil rebuild_header routine, + * that should be never called and used as just bug trap. + */ + + if (!dev->rebuild_header) + dev->rebuild_header = default_rebuild_header; + + /* + * Default initial state at registry is that the + * device is present. + */ + + set_bit(__LINK_STATE_PRESENT, &dev->state); + + dev->next = NULL; + dev_init_scheduler(dev); + write_lock_bh(&dev_base_lock); + *dev_tail = dev; + dev_tail = &dev->next; + hlist_add_head(&dev->name_hlist, head); + hlist_add_head(&dev->index_hlist, dev_index_hash(dev->ifindex)); + dev_hold(dev); + dev->reg_state = NETREG_REGISTERING; + write_unlock_bh(&dev_base_lock); + + /* Notify protocols, that a new device appeared. */ + notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev); + + /* Finish registration after unlock */ + net_set_todo(dev); + ret = 0; + +out: + return ret; +out_err: + free_divert_blk(dev); + goto out; +} + +/** + * register_netdev - register a network device + * @dev: device to register + * + * Take a completed network device structure and add it to the kernel + * interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier + * chain. 0 is returned on success. A negative errno code is returned + * on a failure to set up the device, or if the name is a duplicate. + * + * This is a wrapper around register_netdev that takes the rtnl semaphore + * and expands the device name if you passed a format string to + * alloc_netdev. + */ +int register_netdev(struct net_device *dev) +{ + int err; + + rtnl_lock(); + + /* + * If the name is a format string the caller wants us to do a + * name allocation. + */ + if (strchr(dev->name, '%')) { + err = dev_alloc_name(dev, dev->name); + if (err < 0) + goto out; + } + + /* + * Back compatibility hook. Kill this one in 2.5 + */ + if (dev->name[0] == 0 || dev->name[0] == ' ') { + err = dev_alloc_name(dev, "eth%d"); + if (err < 0) + goto out; + } + + err = register_netdevice(dev); +out: + rtnl_unlock(); + return err; +} +EXPORT_SYMBOL(register_netdev); + +/* + * netdev_wait_allrefs - wait until all references are gone. + * + * This is called when unregistering network devices. + * + * Any protocol or device that holds a reference should register + * for netdevice notification, and cleanup and put back the + * reference if they receive an UNREGISTER event. + * We can get stuck here if buggy protocols don't correctly + * call dev_put. + */ +static void netdev_wait_allrefs(struct net_device *dev) +{ + unsigned long rebroadcast_time, warning_time; + + rebroadcast_time = warning_time = jiffies; + while (atomic_read(&dev->refcnt) != 0) { + if (time_after(jiffies, rebroadcast_time + 1 * HZ)) { + rtnl_shlock(); + + /* Rebroadcast unregister notification */ + notifier_call_chain(&netdev_chain, + NETDEV_UNREGISTER, dev); + + if (test_bit(__LINK_STATE_LINKWATCH_PENDING, + &dev->state)) { + /* We must not have linkwatch events + * pending on unregister. If this + * happens, we simply run the queue + * unscheduled, resulting in a noop + * for this device. + */ + linkwatch_run_queue(); + } + + rtnl_shunlock(); + + rebroadcast_time = jiffies; + } + + msleep(250); + + if (time_after(jiffies, warning_time + 10 * HZ)) { + printk(KERN_EMERG "unregister_netdevice: " + "waiting for %s to become free. Usage " + "count = %d\n", + dev->name, atomic_read(&dev->refcnt)); + warning_time = jiffies; + } + } +} + +/* The sequence is: + * + * rtnl_lock(); + * ... + * register_netdevice(x1); + * register_netdevice(x2); + * ... + * unregister_netdevice(y1); + * unregister_netdevice(y2); + * ... + * rtnl_unlock(); + * free_netdev(y1); + * free_netdev(y2); + * + * We are invoked by rtnl_unlock() after it drops the semaphore. + * This allows us to deal with problems: + * 1) We can create/delete sysfs objects which invoke hotplug + * without deadlocking with linkwatch via keventd. + * 2) Since we run with the RTNL semaphore not held, we can sleep + * safely in order to wait for the netdev refcnt to drop to zero. + */ +static DECLARE_MUTEX(net_todo_run_mutex); +void netdev_run_todo(void) +{ + struct list_head list = LIST_HEAD_INIT(list); + int err; + + + /* Need to guard against multiple cpu's getting out of order. */ + down(&net_todo_run_mutex); + + /* Not safe to do outside the semaphore. We must not return + * until all unregister events invoked by the local processor + * have been completed (either by this todo run, or one on + * another cpu). + */ + if (list_empty(&net_todo_list)) + goto out; + + /* Snapshot list, allow later requests */ + spin_lock(&net_todo_list_lock); + list_splice_init(&net_todo_list, &list); + spin_unlock(&net_todo_list_lock); + + while (!list_empty(&list)) { + struct net_device *dev + = list_entry(list.next, struct net_device, todo_list); + list_del(&dev->todo_list); + + switch(dev->reg_state) { + case NETREG_REGISTERING: + err = netdev_register_sysfs(dev); + if (err) + printk(KERN_ERR "%s: failed sysfs registration (%d)\n", + dev->name, err); + dev->reg_state = NETREG_REGISTERED; + break; + + case NETREG_UNREGISTERING: + netdev_unregister_sysfs(dev); + dev->reg_state = NETREG_UNREGISTERED; + + netdev_wait_allrefs(dev); + + /* paranoia */ + BUG_ON(atomic_read(&dev->refcnt)); + BUG_TRAP(!dev->ip_ptr); + BUG_TRAP(!dev->ip6_ptr); + BUG_TRAP(!dev->dn_ptr); + + + /* It must be the very last action, + * after this 'dev' may point to freed up memory. + */ + if (dev->destructor) + dev->destructor(dev); + break; + + default: + printk(KERN_ERR "network todo '%s' but state %d\n", + dev->name, dev->reg_state); + break; + } + } + +out: + up(&net_todo_run_mutex); +} + +/** + * alloc_netdev - allocate network device + * @sizeof_priv: size of private data to allocate space for + * @name: device name format string + * @setup: callback to initialize device + * + * Allocates a struct net_device with private data area for driver use + * and performs basic initialization. + */ +struct net_device *alloc_netdev(int sizeof_priv, const char *name, + void (*setup)(struct net_device *)) +{ + void *p; + struct net_device *dev; + int alloc_size; + + /* ensure 32-byte alignment of both the device and private area */ + alloc_size = (sizeof(*dev) + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST; + alloc_size += sizeof_priv + NETDEV_ALIGN_CONST; + + p = kmalloc(alloc_size, GFP_KERNEL); + if (!p) { + printk(KERN_ERR "alloc_dev: Unable to allocate device.\n"); + return NULL; + } + memset(p, 0, alloc_size); + + dev = (struct net_device *) + (((long)p + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); + dev->padded = (char *)dev - (char *)p; + + if (sizeof_priv) + dev->priv = netdev_priv(dev); + + setup(dev); + strcpy(dev->name, name); + return dev; +} +EXPORT_SYMBOL(alloc_netdev); + +/** + * free_netdev - free network device + * @dev: device + * + * This function does the last stage of destroying an allocated device + * interface. The reference to the device object is released. + * If this is the last reference then it will be freed. + */ +void free_netdev(struct net_device *dev) +{ +#ifdef CONFIG_SYSFS + /* Compatiablity with error handling in drivers */ + if (dev->reg_state == NETREG_UNINITIALIZED) { + kfree((char *)dev - dev->padded); + return; + } + + BUG_ON(dev->reg_state != NETREG_UNREGISTERED); + dev->reg_state = NETREG_RELEASED; + + /* will free via class release */ + class_device_put(&dev->class_dev); +#else + kfree((char *)dev - dev->padded); +#endif +} + +/* Synchronize with packet receive processing. */ +void synchronize_net(void) +{ + might_sleep(); + synchronize_rcu(); +} + +/** + * unregister_netdevice - remove device from the kernel + * @dev: device + * + * This function shuts down a device interface and removes it + * from the kernel tables. On success 0 is returned, on a failure + * a negative errno code is returned. + * + * Callers must hold the rtnl semaphore. You may want + * unregister_netdev() instead of this. + */ + +int unregister_netdevice(struct net_device *dev) +{ + struct net_device *d, **dp; + + BUG_ON(dev_boot_phase); + ASSERT_RTNL(); + + /* Some devices call without registering for initialization unwind. */ + if (dev->reg_state == NETREG_UNINITIALIZED) { + printk(KERN_DEBUG "unregister_netdevice: device %s/%p never " + "was registered\n", dev->name, dev); + return -ENODEV; + } + + BUG_ON(dev->reg_state != NETREG_REGISTERED); + + /* If device is running, close it first. */ + if (dev->flags & IFF_UP) + dev_close(dev); + + /* And unlink it from device chain. */ + for (dp = &dev_base; (d = *dp) != NULL; dp = &d->next) { + if (d == dev) { + write_lock_bh(&dev_base_lock); + hlist_del(&dev->name_hlist); + hlist_del(&dev->index_hlist); + if (dev_tail == &dev->next) + dev_tail = dp; + *dp = d->next; + write_unlock_bh(&dev_base_lock); + break; + } + } + if (!d) { + printk(KERN_ERR "unregister net_device: '%s' not found\n", + dev->name); + return -ENODEV; + } + + dev->reg_state = NETREG_UNREGISTERING; + + synchronize_net(); + + /* Shutdown queueing discipline. */ + dev_shutdown(dev); + + + /* Notify protocols, that we are about to destroy + this device. They should clean all the things. + */ + notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev); + + /* + * Flush the multicast chain + */ + dev_mc_discard(dev); + + if (dev->uninit) + dev->uninit(dev); + + /* Notifier chain MUST detach us from master device. */ + BUG_TRAP(!dev->master); + + free_divert_blk(dev); + + /* Finish processing unregister after unlock */ + net_set_todo(dev); + + synchronize_net(); + + dev_put(dev); + return 0; +} + +/** + * unregister_netdev - remove device from the kernel + * @dev: device + * + * This function shuts down a device interface and removes it + * from the kernel tables. On success 0 is returned, on a failure + * a negative errno code is returned. + * + * This is just a wrapper for unregister_netdevice that takes + * the rtnl semaphore. In general you want to use this and not + * unregister_netdevice. + */ +void unregister_netdev(struct net_device *dev) +{ + rtnl_lock(); + unregister_netdevice(dev); + rtnl_unlock(); +} + +EXPORT_SYMBOL(unregister_netdev); + +#ifdef CONFIG_HOTPLUG_CPU +static int dev_cpu_callback(struct notifier_block *nfb, + unsigned long action, + void *ocpu) +{ + struct sk_buff **list_skb; + struct net_device **list_net; + struct sk_buff *skb; + unsigned int cpu, oldcpu = (unsigned long)ocpu; + struct softnet_data *sd, *oldsd; + + if (action != CPU_DEAD) + return NOTIFY_OK; + + local_irq_disable(); + cpu = smp_processor_id(); + sd = &per_cpu(softnet_data, cpu); + oldsd = &per_cpu(softnet_data, oldcpu); + + /* Find end of our completion_queue. */ + list_skb = &sd->completion_queue; + while (*list_skb) + list_skb = &(*list_skb)->next; + /* Append completion queue from offline CPU. */ + *list_skb = oldsd->completion_queue; + oldsd->completion_queue = NULL; + + /* Find end of our output_queue. */ + list_net = &sd->output_queue; + while (*list_net) + list_net = &(*list_net)->next_sched; + /* Append output queue from offline CPU. */ + *list_net = oldsd->output_queue; + oldsd->output_queue = NULL; + + raise_softirq_irqoff(NET_TX_SOFTIRQ); + local_irq_enable(); + + /* Process offline CPU's input_pkt_queue */ + while ((skb = __skb_dequeue(&oldsd->input_pkt_queue))) + netif_rx(skb); + + return NOTIFY_OK; +} +#endif /* CONFIG_HOTPLUG_CPU */ + + +/* + * Initialize the DEV module. At boot time this walks the device list and + * unhooks any devices that fail to initialise (normally hardware not + * present) and leaves us with a valid list of present and active devices. + * + */ + +/* + * This is called single threaded during boot, so no need + * to take the rtnl semaphore. + */ +static int __init net_dev_init(void) +{ + int i, rc = -ENOMEM; + + BUG_ON(!dev_boot_phase); + + net_random_init(); + + if (dev_proc_init()) + goto out; + + if (netdev_sysfs_init()) + goto out; + + INIT_LIST_HEAD(&ptype_all); + for (i = 0; i < 16; i++) + INIT_LIST_HEAD(&ptype_base[i]); + + for (i = 0; i < ARRAY_SIZE(dev_name_head); i++) + INIT_HLIST_HEAD(&dev_name_head[i]); + + for (i = 0; i < ARRAY_SIZE(dev_index_head); i++) + INIT_HLIST_HEAD(&dev_index_head[i]); + + /* + * Initialise the packet receive queues. + */ + + for (i = 0; i < NR_CPUS; i++) { + struct softnet_data *queue; + + queue = &per_cpu(softnet_data, i); + skb_queue_head_init(&queue->input_pkt_queue); + queue->throttle = 0; + queue->cng_level = 0; + queue->avg_blog = 10; /* arbitrary non-zero */ + queue->completion_queue = NULL; + INIT_LIST_HEAD(&queue->poll_list); + set_bit(__LINK_STATE_START, &queue->backlog_dev.state); + queue->backlog_dev.weight = weight_p; + queue->backlog_dev.poll = process_backlog; + atomic_set(&queue->backlog_dev.refcnt, 1); + } + +#ifdef OFFLINE_SAMPLE + samp_timer.expires = jiffies + (10 * HZ); + add_timer(&samp_timer); +#endif + + dev_boot_phase = 0; + + open_softirq(NET_TX_SOFTIRQ, net_tx_action, NULL); + open_softirq(NET_RX_SOFTIRQ, net_rx_action, NULL); + + hotcpu_notifier(dev_cpu_callback, 0); + dst_init(); + dev_mcast_init(); + rc = 0; +out: + return rc; +} + +subsys_initcall(net_dev_init); + +EXPORT_SYMBOL(__dev_get_by_index); +EXPORT_SYMBOL(__dev_get_by_name); +EXPORT_SYMBOL(__dev_remove_pack); +EXPORT_SYMBOL(__skb_linearize); +EXPORT_SYMBOL(dev_add_pack); +EXPORT_SYMBOL(dev_alloc_name); +EXPORT_SYMBOL(dev_close); +EXPORT_SYMBOL(dev_get_by_flags); +EXPORT_SYMBOL(dev_get_by_index); +EXPORT_SYMBOL(dev_get_by_name); +EXPORT_SYMBOL(dev_ioctl); +EXPORT_SYMBOL(dev_open); +EXPORT_SYMBOL(dev_queue_xmit); +EXPORT_SYMBOL(dev_remove_pack); +EXPORT_SYMBOL(dev_set_allmulti); +EXPORT_SYMBOL(dev_set_promiscuity); +EXPORT_SYMBOL(dev_change_flags); +EXPORT_SYMBOL(dev_set_mtu); +EXPORT_SYMBOL(dev_set_mac_address); +EXPORT_SYMBOL(free_netdev); +EXPORT_SYMBOL(netdev_boot_setup_check); +EXPORT_SYMBOL(netdev_set_master); +EXPORT_SYMBOL(netdev_state_change); +EXPORT_SYMBOL(netif_receive_skb); +EXPORT_SYMBOL(netif_rx); +EXPORT_SYMBOL(register_gifconf); +EXPORT_SYMBOL(register_netdevice); +EXPORT_SYMBOL(register_netdevice_notifier); +EXPORT_SYMBOL(skb_checksum_help); +EXPORT_SYMBOL(synchronize_net); +EXPORT_SYMBOL(unregister_netdevice); +EXPORT_SYMBOL(unregister_netdevice_notifier); +EXPORT_SYMBOL(net_enable_timestamp); +EXPORT_SYMBOL(net_disable_timestamp); +EXPORT_SYMBOL(dev_get_flags); + +#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) +EXPORT_SYMBOL(br_handle_frame_hook); +EXPORT_SYMBOL(br_fdb_get_hook); +EXPORT_SYMBOL(br_fdb_put_hook); +#endif + +#ifdef CONFIG_KMOD +EXPORT_SYMBOL(dev_load); +#endif + +EXPORT_PER_CPU_SYMBOL(softnet_data); diff --unified --recursive --new-file linux-2.6.12.5/net/ring/Kconfig linux-2.6.12.5-1-686-smp-ring3/net/ring/Kconfig --- linux-2.6.12.5/net/ring/Kconfig 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.12.5-1-686-smp-ring3/net/ring/Kconfig 2005-10-22 23:50:45.539482000 +0200 @@ -0,0 +1,14 @@ +config RING + tristate "PF_RING sockets (EXPERIMENTAL)" + depends on EXPERIMENTAL + ---help--- + PF_RING socket family, optimized for packet capture. + If a PF_RING socket is bound to an adapter (via the bind() system + call), such adapter will be used in read-only mode until the socket + is destroyed. Whenever an incoming packet is received from the adapter + it will not passed to upper layers, but instead it is copied to a ring + buffer, which in turn is exported to user space applications via mmap. + Please refer to http://luca.ntop.org/Ring.pdf for more. + + Say N unless you know what you are doing. + diff --unified --recursive --new-file linux-2.6.12.5/net/ring/Makefile linux-2.6.12.5-1-686-smp-ring3/net/ring/Makefile --- linux-2.6.12.5/net/ring/Makefile 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.12.5-1-686-smp-ring3/net/ring/Makefile 2005-10-22 23:50:45.051451500 +0200 @@ -0,0 +1,7 @@ +# +# Makefile for the ring driver. +# + +obj-m += ring.o + +ring-objs := ring_packet.o diff --unified --recursive --new-file linux-2.6.12.5/net/ring/ring_packet.c linux-2.6.12.5-1-686-smp-ring3/net/ring/ring_packet.c --- linux-2.6.12.5/net/ring/ring_packet.c 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.12.5-1-686-smp-ring3/net/ring/ring_packet.c 2005-10-22 23:50:45.159458250 +0200 @@ -0,0 +1,1592 @@ +/* + * + * (C) 2004-05 - Luca Deri + * + * This code includes patches courtesy of + * - Jeff Randall + * - Helmut Manck + * - Brad Doctor + * + */ + +/* FIX: add an entry inside the /proc filesystem */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) +#include +#else +#include +#endif +#include +#include /* needed for virt_to_phys() */ + +/* #define RING_DEBUG */ + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,11)) +static inline int remap_page_range(struct vm_area_struct *vma, + unsigned long uvaddr, + unsigned long paddr, + unsigned long size, + pgprot_t prot) { + return(remap_pfn_range(vma, uvaddr, paddr >> PAGE_SHIFT, + size, prot)); +} +#endif + +/* ************************************************* */ + +#define CLUSTER_LEN 8 + +struct ring_cluster { + u_short cluster_id; /* 0 = no cluster */ + u_short num_cluster_elements; + enum cluster_type hashing_mode; + u_short hashing_id; + struct sock *sk[CLUSTER_LEN]; + struct ring_cluster *next; /* NULL = last element of the cluster */ +}; + +/* ************************************************* */ + +struct ring_element { + struct list_head list; + struct sock *sk; +}; + +/* ************************************************* */ + +struct ring_opt { + struct net_device *ring_netdev; + + /* Cluster */ + u_short cluster_id; /* 0 = no cluster */ + + /* Reflector */ + struct net_device *reflector_dev; + + /* Packet buffers */ + unsigned long order; + + /* Ring Slots */ + unsigned long ring_memory; + FlowSlotInfo *slots_info; /* Basically it points to ring_memory */ + char *ring_slots; /* Basically it points to ring_memory + +sizeof(FlowSlotInfo) */ + + /* Packet Sampling */ + u_int pktToSample, sample_rate; + + /* BPF Filter */ + struct sk_filter *bpfFilter; + + /* Locks */ + atomic_t num_ring_slots_waiters; + wait_queue_head_t ring_slots_waitqueue; + rwlock_t ring_index_lock; + + /* Indexes (Internal) */ + u_int insert_page_id, insert_slot_id; +}; + +/* ************************************************* */ + +/* List of all ring sockets. */ +static struct list_head ring_table; + +/* List of all clusters */ +static struct ring_cluster *ring_cluster_list; + +static rwlock_t ring_mgmt_lock = RW_LOCK_UNLOCKED; + +/* ********************************** */ + +/* Forward */ +static struct proto_ops ring_ops; + +#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,11)) +static struct proto ring_proto; +#endif + +static int skb_ring_handler(struct sk_buff *skb, u_char recv_packet, + u_char real_skb); +static int buffer_ring_handler(struct net_device *dev, char *data, int len); +static int remove_from_cluster(struct sock *sock, struct ring_opt *pfr); + +/* Extern */ + +/* ********************************** */ + +/* Defaults */ +static u_int bucket_len = 128, num_slots = 4096, sample_rate = 1, + transparent_mode = 0, enable_tx_capture = 0; + +MODULE_PARM(bucket_len, "i"); +MODULE_PARM_DESC(bucket_len, "Number of ring buckets"); +MODULE_PARM(num_slots, "i"); +MODULE_PARM_DESC(num_slots, "Number of ring slots"); +MODULE_PARM(sample_rate, "i"); +MODULE_PARM_DESC(sample_rate, "Ring packet sample rate"); +MODULE_PARM(transparent_mode, "i"); +MODULE_PARM_DESC(transparent_mode, + "Set to 1 to set transparent mode " + "(slower but backwards compatible)"); +MODULE_PARM(enable_tx_capture, "i"); +MODULE_PARM_DESC(enable_tx_capture, "Set to 1 to capture outgoing packets"); + +/* ********************************** */ + +#define MIN_QUEUED_PKTS 64 +#define MAX_QUEUE_LOOPS 64 + + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) +#define ring_sk_datatype(__sk) ((struct ring_opt *)__sk) +#define ring_sk(__sk) ((__sk)->sk_protinfo) +#else +#define ring_sk_datatype(a) (a) +#define ring_sk(__sk) ((__sk)->protinfo.pf_ring) +#endif + +/* + int dev_queue_xmit(struct sk_buff *skb) + skb->dev; + struct net_device *dev_get_by_name(const char *name) +*/ + +/* ********************************** */ + +static void ring_sock_destruct(struct sock *sk) { + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) + skb_queue_purge(&sk->sk_receive_queue); + + if (!sock_flag(sk, SOCK_DEAD)) { +#if defined(RING_DEBUG) + printk("Attempt to release alive ring socket: %p\n", sk); +#endif + return; + } + + BUG_TRAP(!atomic_read(&sk->sk_rmem_alloc)); + BUG_TRAP(!atomic_read(&sk->sk_wmem_alloc)); +#else + + BUG_TRAP(atomic_read(&sk->rmem_alloc)==0); + BUG_TRAP(atomic_read(&sk->wmem_alloc)==0); + + if (!sk->dead) { +#if defined(RING_DEBUG) + printk("Attempt to release alive ring socket: %p\n", sk); +#endif + return; + } +#endif + + kfree(ring_sk(sk)); + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) + MOD_DEC_USE_COUNT; +#endif +} + +/* ********************************** */ +/* + * ring_insert() + * + * store the sk in a new element and add it + * to the head of the list. + */ +static inline void ring_insert(struct sock *sk) { + struct ring_element *next; + +#if defined(RING_DEBUG) + printk("RING: ring_insert()\n"); +#endif + + next = kmalloc(sizeof(struct ring_element), GFP_ATOMIC); + if(next != NULL) { + next->sk = sk; + write_lock_irq(&ring_mgmt_lock); + list_add(&next->list, &ring_table); + write_unlock_irq(&ring_mgmt_lock); + } else { + if (net_ratelimit()) + printk("RING: could not kmalloc slot!!\n"); + } +} + +/* ********************************** */ +/* + * ring_remove() + * + * For each of the elements in the list: + * - check if this is the element we want to delete + * - if it is, remove it from the list, and free it. + * + * stop when we find the one we're looking for (break), + * or when we reach the end of the list. + */ +static inline void ring_remove(struct sock *sk) { + struct list_head *ptr; + struct ring_element *entry; + + + for(ptr = ring_table.next; ptr != &ring_table; ptr = ptr->next) { + entry = list_entry(ptr, struct ring_element, list); + + if(entry->sk == sk) { + write_lock_irq(&ring_mgmt_lock); + list_del(ptr); + kfree(ptr); + write_unlock_irq(&ring_mgmt_lock); + break; + } + } + +} + +/* ********************************** */ + +static u_int32_t num_queued_pkts(struct ring_opt *pfr) { + + if(pfr->ring_slots != NULL) { + + u_int32_t tot_insert = pfr->slots_info->insert_idx, +#if defined(RING_DEBUG) + tot_read = pfr->slots_info->tot_read, tot_pkts; +#else + tot_read = pfr->slots_info->tot_read; +#endif + + if(tot_insert >= tot_read) { +#if defined(RING_DEBUG) + tot_pkts = tot_insert-tot_read; +#endif + return(tot_insert-tot_read); + } else { +#if defined(RING_DEBUG) + tot_pkts = ((u_int32_t)-1)+tot_insert-tot_read; +#endif + return(((u_int32_t)-1)+tot_insert-tot_read); + } + +#if defined(RING_DEBUG) + printk("-> num_queued_pkts=%d [tot_insert=%d][tot_read=%d]\n", + tot_pkts, tot_insert, tot_read); +#endif + + } else + return(0); +} + +/* ********************************** */ + +static inline FlowSlot* get_insert_slot(struct ring_opt *pfr) { +#if defined(RING_DEBUG) + printk("get_insert_slot(%d)\n", pfr->slots_info->insert_idx); +#endif + + if(pfr->ring_slots != NULL) { + FlowSlot *slot = (FlowSlot*)&(pfr->ring_slots[pfr->slots_info->insert_idx + *pfr->slots_info->slot_len]); + return(slot); + } else + return(NULL); +} + +/* ********************************** */ + +static inline FlowSlot* get_remove_slot(struct ring_opt *pfr) { +#if defined(RING_DEBUG) + printk("get_remove_slot(%d)\n", pfr->slots_info->remove_idx); +#endif + + if(pfr->ring_slots != NULL) + return((FlowSlot*)&(pfr->ring_slots[pfr->slots_info->remove_idx* + pfr->slots_info->slot_len])); + else + return(NULL); +} + +/* ********************************** */ + +static void add_skb_to_ring(struct sk_buff *skb, + struct ring_opt *pfr, + u_char recv_packet, + u_char real_skb /* 1=skb 0=faked skb */) { + FlowSlot *theSlot; + int idx, displ; + + if(recv_packet) { + /* Hack for identifying a packet received by the e1000 */ + if(real_skb) { + displ = SKB_DISPLACEMENT; + } else + displ = 0; /* Received by the e1000 wrapper */ + } else + displ = 0; + + write_lock(&pfr->ring_index_lock); + pfr->slots_info->tot_pkts++; + write_unlock(&pfr->ring_index_lock); + + /* BPF Filtering (from af_packet.c) */ + if(pfr->bpfFilter != NULL) { + unsigned res = 1, len; + + len = skb->len-skb->data_len; + + write_lock(&pfr->ring_index_lock); + skb->data -= displ; + res = sk_run_filter(skb, pfr->bpfFilter->insns, pfr->bpfFilter->len); + skb->data += displ; + write_unlock(&pfr->ring_index_lock); + + if(res == 0) { + /* Filter failed */ + +#if defined(RING_DEBUG) + printk("add_skb_to_ring(skb): Filter failed [len=%d][tot=%llu]" + "[insertIdx=%d][pkt_type=%d][cloned=%d]\n", + (int)skb->len, pfr->slots_info->tot_pkts, + pfr->slots_info->insert_idx, + skb->pkt_type, skb->cloned); +#endif + + return; + } + } + + /* ************************** */ + + if(pfr->sample_rate > 1) { + if(pfr->pktToSample == 0) { + write_lock(&pfr->ring_index_lock); + pfr->pktToSample = pfr->sample_rate; + write_unlock(&pfr->ring_index_lock); + } else { + write_lock(&pfr->ring_index_lock); + pfr->pktToSample--; + write_unlock(&pfr->ring_index_lock); + +#if defined(RING_DEBUG) + printk("add_skb_to_ring(skb): sampled packet [len=%d]" + "[tot=%llu][insertIdx=%d][pkt_type=%d][cloned=%d]\n", + (int)skb->len, pfr->slots_info->tot_pkts, + pfr->slots_info->insert_idx, + skb->pkt_type, skb->cloned); +#endif + return; + } + } + + /* ************************************* */ + + if((pfr->reflector_dev != NULL) + && (!netif_queue_stopped(pfr->reflector_dev))) { + int cpu = smp_processor_id(); + + /* increase reference counter so that this skb is not freed */ + atomic_inc(&skb->users); + + skb->data -= displ; + + /* send it */ + if (pfr->reflector_dev->xmit_lock_owner != cpu) { + spin_lock_bh(&pfr->reflector_dev->xmit_lock); + pfr->reflector_dev->xmit_lock_owner = cpu; + spin_unlock_bh(&pfr->reflector_dev->xmit_lock); + + if (pfr->reflector_dev->hard_start_xmit(skb, + pfr->reflector_dev) == 0) { + spin_lock_bh(&pfr->reflector_dev->xmit_lock); + pfr->reflector_dev->xmit_lock_owner = -1; + skb->data += displ; + spin_unlock_bh(&pfr->reflector_dev->xmit_lock); +#if defined(RING_DEBUG) + printk("++ hard_start_xmit succeeded\n"); +#endif + return; /* OK */ + } + + spin_lock_bh(&pfr->reflector_dev->xmit_lock); + pfr->reflector_dev->xmit_lock_owner = -1; + spin_unlock_bh(&pfr->reflector_dev->xmit_lock); + } + +#if defined(RING_DEBUG) + printk("++ hard_start_xmit failed\n"); +#endif + skb->data += displ; + return; /* -ENETDOWN */ + } + + /* ************************************* */ + +#if defined(RING_DEBUG) + printk("add_skb_to_ring(skb) [len=%d][tot=%llu][insertIdx=%d]" + "[pkt_type=%d][cloned=%d]\n", + (int)skb->len, pfr->slots_info->tot_pkts, + pfr->slots_info->insert_idx, + skb->pkt_type, skb->cloned); +#endif + + idx = pfr->slots_info->insert_idx; + theSlot = get_insert_slot(pfr); + + if((theSlot != NULL) && (theSlot->slot_state == 0)) { + struct pcap_pkthdr *hdr; + unsigned int bucketSpace; + char *bucket; + + /* Update Index */ + idx++; + + if(idx == pfr->slots_info->tot_slots) { + write_lock(&pfr->ring_index_lock); + pfr->slots_info->insert_idx = 0; + write_unlock(&pfr->ring_index_lock); + } else { + write_lock(&pfr->ring_index_lock); + pfr->slots_info->insert_idx = idx; + write_unlock(&pfr->ring_index_lock); + } + + bucketSpace = pfr->slots_info->slot_len +#ifdef RING_MAGIC + - sizeof(u_char) +#endif + - sizeof(u_char) /* flowSlot.slot_state */ + - sizeof(struct pcap_pkthdr) + - 1 /* 10 */ /* safe boundary */; + + bucket = &theSlot->bucket; + hdr = (struct pcap_pkthdr*)bucket; + + if(skb->stamp.tv_sec == 0) do_gettimeofday(&skb->stamp); + + hdr->ts.tv_sec = skb->stamp.tv_sec, hdr->ts.tv_usec = skb->stamp.tv_usec; + hdr->caplen = skb->len+displ; + + if(hdr->caplen > bucketSpace) + hdr->caplen = bucketSpace; + + hdr->len = skb->len+displ; + memcpy(&bucket[sizeof(struct pcap_pkthdr)], + skb->data-displ, hdr->caplen); + +#if defined(RING_DEBUG) + { + static unsigned int lastLoss = 0; + + if(pfr->slots_info->tot_lost + && (lastLoss != pfr->slots_info->tot_lost)) { + printk("add_skb_to_ring(%d): [bucketSpace=%d]" + "[hdr.caplen=%d][skb->len=%d]" + "[pcap_pkthdr=%d][removeIdx=%d]" + "[loss=%lu][page=%u][slot=%u]\n", + idx-1, bucketSpace, hdr->caplen, skb->len, + sizeof(struct pcap_pkthdr), + pfr->slots_info->remove_idx, + (long unsigned int)pfr->slots_info->tot_lost, + pfr->insert_page_id, pfr->insert_slot_id); + + lastLoss = pfr->slots_info->tot_lost; + } + } +#endif + + write_lock(&pfr->ring_index_lock); + pfr->slots_info->tot_insert++; + theSlot->slot_state = 1; + write_unlock(&pfr->ring_index_lock); + } else { + write_lock(&pfr->ring_index_lock); + pfr->slots_info->tot_lost++; + write_unlock(&pfr->ring_index_lock); + +#if defined(RING_DEBUG) + printk("add_skb_to_ring(skb): packet lost [loss=%lu]" + "[removeIdx=%u][insertIdx=%u]\n", + (long unsigned int)pfr->slots_info->tot_lost, + pfr->slots_info->remove_idx, pfr->slots_info->insert_idx); +#endif + } + + /* wakeup in case of poll() */ + if(waitqueue_active(&pfr->ring_slots_waitqueue)) + wake_up_interruptible(&pfr->ring_slots_waitqueue); +} + +/* ********************************** */ + +static u_int hash_skb(struct ring_cluster *cluster_ptr, + struct sk_buff *skb, u_char recv_packet) { + u_int idx; + int displ; + struct iphdr *ip; + + if(cluster_ptr->hashing_mode == cluster_round_robin) { + idx = cluster_ptr->hashing_id++; + } else { + /* Per-flow clustering */ + if(skb->len > sizeof(struct iphdr)+sizeof(struct tcphdr)) { + if(recv_packet) + displ = 0; + else + displ = SKB_DISPLACEMENT; + + /* + skb->data+displ + + Always points to to the IP part of the packet + */ + + ip = (struct iphdr*)(skb->data+displ); + + idx = ip->saddr+ip->daddr+ip->protocol; + + if(ip->protocol == IPPROTO_TCP) { + struct tcphdr *tcp = (struct tcphdr*)(skb->data+displ + +sizeof(struct iphdr)); + idx += tcp->source+tcp->dest; + } else if(ip->protocol == IPPROTO_UDP) { + struct udphdr *udp = (struct udphdr*)(skb->data+displ + +sizeof(struct iphdr)); + idx += udp->source+udp->dest; + } + } else + idx = skb->len; + } + + return(idx % cluster_ptr->num_cluster_elements); +} + +/* ********************************** */ + +static int skb_ring_handler(struct sk_buff *skb, + u_char recv_packet, + u_char real_skb /* 1=skb 0=faked skb */) { + struct sock *skElement; + int rc = 0; + struct list_head *ptr; + struct ring_cluster *cluster_ptr; + + if((!skb) /* Invalid skb */ + || ((!enable_tx_capture) && (!recv_packet))) { + /* + An outgoing packet is about to be sent out + but we decided not to handle transmitted + packets. + */ + return(0); + } + +#if defined(RING_DEBUG) + if(0) { + printk("skb_ring_handler() [len=%d][dev=%s]\n", skb->len, + skb->dev->name == NULL ? "" : skb->dev->name); + } +#endif + + /* [1] Check unclustered sockets */ + for (ptr = ring_table.next; ptr != &ring_table; ptr = ptr->next) { + struct ring_opt *pfr; + struct ring_element *entry; + + entry = list_entry(ptr, struct ring_element, list); + + read_lock(&ring_mgmt_lock); + skElement = entry->sk; + pfr = ring_sk(skElement); + read_unlock(&ring_mgmt_lock); + + if((pfr != NULL) + && (pfr->cluster_id == 0 /* No cluster */) + && (pfr->ring_slots != NULL) + && (pfr->ring_netdev == skb->dev)) { + /* We've found the ring where the packet can be stored */ + read_lock(&ring_mgmt_lock); + add_skb_to_ring(skb, pfr, recv_packet, real_skb); + read_unlock(&ring_mgmt_lock); + + rc = 1; /* Ring found: we've done our job */ + } + } + + /* [2] Check socket clusters */ + cluster_ptr = ring_cluster_list; + + while(cluster_ptr != NULL) { + struct ring_opt *pfr; + + if(cluster_ptr->num_cluster_elements > 0) { + u_int skb_hash = hash_skb(cluster_ptr, skb, recv_packet); + + read_lock(&ring_mgmt_lock); + skElement = cluster_ptr->sk[skb_hash]; + read_unlock(&ring_mgmt_lock); + + if(skElement != NULL) { + pfr = ring_sk(skElement); + + if((pfr != NULL) + && (pfr->ring_slots != NULL) + && (pfr->ring_netdev == skb->dev)) { + /* We've found the ring where the packet can be stored */ + read_lock(&ring_mgmt_lock); + add_skb_to_ring(skb, pfr, recv_packet, real_skb); + read_unlock(&ring_mgmt_lock); + + rc = 1; /* Ring found: we've done our job */ + } + } + } + + cluster_ptr = cluster_ptr->next; + } + + if(transparent_mode) rc = 0; + + if((rc != 0) && real_skb) + dev_kfree_skb(skb); /* Free the skb */ + + return(rc); /* 0 = packet not handled */ +} + +/* ********************************** */ + +struct sk_buff skb; + +static int buffer_ring_handler(struct net_device *dev, + char *data, int len) { + +#if defined(RING_DEBUG) + printk("buffer_ring_handler: [dev=%s][len=%d]\n", + dev->name == NULL ? "" : dev->name, len); +#endif + + skb.dev = dev, skb.len = len, skb.data = data, + skb.data_len = len, skb.stamp.tv_sec = 0; /* Calculate the time */ + + skb_ring_handler(&skb, 1, 0 /* fake skb */); + + return(0); +} + +/* ********************************** */ + +static int ring_create(struct socket *sock, int protocol) { + struct sock *sk; + struct ring_opt *pfr; + int err; + +#if defined(RING_DEBUG) + printk("RING: ring_create()\n"); +#endif + + /* Are you root, superuser or so ? */ + if(!capable(CAP_NET_ADMIN)) + return -EPERM; + + if(sock->type != SOCK_RAW) + return -ESOCKTNOSUPPORT; + + if(protocol != htons(ETH_P_ALL)) + return -EPROTONOSUPPORT; + +#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) + MOD_INC_USE_COUNT; +#endif + + err = -ENOMEM; + + // BD: -- broke this out to keep it more simple and clear as to what the + // options are. +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) +#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)) + sk = sk_alloc(PF_RING, GFP_KERNEL, 1, NULL); +#endif +#endif + + // BD: API changed in 2.6.12, ref: + // http://svn.clkao.org/svnweb/linux/revision/?rev=28201 +#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,11)) + sk = sk_alloc(PF_RING, GFP_ATOMIC, &ring_proto, 1); +#endif + + if (sk == NULL) + goto out; + + sock->ops = &ring_ops; + sock_init_data(sock, sk); +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) +#if (LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,11)) + sk_set_owner(sk, THIS_MODULE); +#endif +#endif + + err = -ENOMEM; + ring_sk(sk) = ring_sk_datatype(kmalloc(sizeof(*pfr), GFP_KERNEL)); + + if (!(pfr = ring_sk(sk))) { + sk_free(sk); + goto out; + } + memset(pfr, 0, sizeof(*pfr)); + init_waitqueue_head(&pfr->ring_slots_waitqueue); + pfr->ring_index_lock = RW_LOCK_UNLOCKED; + atomic_set(&pfr->num_ring_slots_waiters, 0); +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) + sk->sk_family = PF_RING; + sk->sk_destruct = ring_sock_destruct; +#else + sk->family = PF_RING; + sk->destruct = ring_sock_destruct; + sk->num = protocol; +#endif + + ring_insert(sk); + +#if defined(RING_DEBUG) + printk("RING: ring_create() - created\n"); +#endif + + return(0); + out: +#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,0)) + MOD_DEC_USE_COUNT; +#endif + return err; +} + +/* *********************************************** */ + +static int ring_release(struct socket *sock) +{ + struct sock *sk = sock->sk; + struct ring_opt *pfr = ring_sk(sk); + + if(!sk) + return 0; + +#if defined(RING_DEBUG) + printk("RING: called ring_release\n"); +#endif + +#if defined(RING_DEBUG) + printk("RING: ring_release entered\n"); +#endif + + ring_remove(sk); + + sock_orphan(sk); + sock->sk = NULL; + + /* Free the ring buffer */ + if(pfr->ring_memory) { + struct page *page, *page_end; + + page_end = virt_to_page(pfr->ring_memory + (PAGE_SIZE << pfr->order) - 1); + for(page = virt_to_page(pfr->ring_memory); page <= page_end; page++) + ClearPageReserved(page); + + free_pages(pfr->ring_memory, pfr->order); + } + + kfree(pfr); + ring_sk(sk) = NULL; + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) + skb_queue_purge(&sk->sk_write_queue); +#endif + sock_put(sk); + +#if defined(RING_DEBUG) + printk("RING: ring_release leaving\n"); +#endif + + return 0; +} + +/* ********************************** */ +/* + * We create a ring for this socket and bind it to the specified device + */ +static int packet_ring_bind(struct sock *sk, struct net_device *dev) +{ + u_int the_slot_len; + u_int32_t tot_mem; + struct ring_opt *pfr = ring_sk(sk); + struct page *page, *page_end; + + if(!dev) return(-1); + +#if defined(RING_DEBUG) + printk("RING: packet_ring_bind(%s) called\n", dev->name); +#endif + + /* ********************************************** + + ************************************* + * * + * FlowSlotInfo * + * * + ************************************* <-+ + * FlowSlot * | + ************************************* | + * FlowSlot * | + ************************************* +- num_slots + * FlowSlot * | + ************************************* | + * FlowSlot * | + ************************************* <-+ + + ********************************************** */ + + the_slot_len = sizeof(u_char) /* flowSlot.slot_state */ + + sizeof(u_short) /* flowSlot.slot_len */ + + bucket_len /* flowSlot.bucket */; + + tot_mem = sizeof(FlowSlotInfo) + num_slots*the_slot_len; + + /* + Calculate the value of the order parameter used later. + See http://www.linuxjournal.com/article.php?sid=1133 + */ + for(pfr->order = 0;(PAGE_SIZE << pfr->order) < tot_mem; pfr->order++) ; + + /* + We now try to allocate the memory as required. If we fail + we try to allocate a smaller amount or memory (hence a + smaller ring). + */ + while((pfr->ring_memory = __get_free_pages(GFP_ATOMIC, pfr->order)) == 0) + if(pfr->order-- == 0) + break; + + if(pfr->order == 0) { +#if defined(RING_DEBUG) + printk("ERROR: not enough memory\n"); +#endif + return(-1); + } else { +#if defined(RING_DEBUG) + printk("RING: succesfully allocated %lu KB [tot_mem=%d][order=%ld]\n", + PAGE_SIZE >> (10 - pfr->order), tot_mem, pfr->order); +#endif + } + + tot_mem = PAGE_SIZE << pfr->order; + memset((char*)pfr->ring_memory, 0, tot_mem); + + /* Now we need to reserve the pages */ + page_end = virt_to_page(pfr->ring_memory + (PAGE_SIZE << pfr->order) - 1); + for(page = virt_to_page(pfr->ring_memory); page <= page_end; page++) + SetPageReserved(page); + + pfr->slots_info = (FlowSlotInfo*)pfr->ring_memory; + pfr->ring_slots = (char*)(pfr->ring_memory+sizeof(FlowSlotInfo)); + + pfr->slots_info->version = RING_FLOWSLOT_VERSION; + pfr->slots_info->slot_len = the_slot_len; + pfr->slots_info->tot_slots = (tot_mem-sizeof(FlowSlotInfo))/the_slot_len; + pfr->slots_info->tot_mem = tot_mem; + pfr->slots_info->sample_rate = sample_rate; + +#if defined(RING_DEBUG) + printk("RING: allocated %d slots [slot_len=%d][tot_mem=%u]\n", + pfr->slots_info->tot_slots, pfr->slots_info->slot_len, + pfr->slots_info->tot_mem); +#endif + +#ifdef RING_MAGIC + { + int i; + + for(i=0; islots_info->tot_slots; i++) { + unsigned long idx = i*pfr->slots_info->slot_len; + FlowSlot *slot = (FlowSlot*)&pfr->ring_slots[idx]; + slot->magic = RING_MAGIC_VALUE; slot->slot_state = 0; + } + } +#endif + + pfr->insert_page_id = 1, pfr->insert_slot_id = 0; + + /* + IMPORTANT + Leave this statement here as last one. In fact when + the ring_netdev != NULL the socket is ready to be used. + */ + pfr->ring_netdev = dev; + + return(0); +} + +/* ************************************* */ + +/* Bind to a device */ +static int ring_bind(struct socket *sock, + struct sockaddr *sa, int addr_len) +{ + struct sock *sk=sock->sk; + struct net_device *dev = NULL; + +#if defined(RING_DEBUG) + printk("RING: ring_bind() called\n"); +#endif + + /* + * Check legality + */ + if (addr_len != sizeof(struct sockaddr)) + return -EINVAL; + if (sa->sa_family != PF_RING) + return -EINVAL; + + /* Safety check: add trailing zero if missing */ + sa->sa_data[sizeof(sa->sa_data)-1] = '\0'; + +#if defined(RING_DEBUG) + printk("RING: searching device %s\n", sa->sa_data); +#endif + + if((dev = __dev_get_by_name(sa->sa_data)) == NULL) { +#if defined(RING_DEBUG) + printk("RING: search failed\n"); +#endif + return(-EINVAL); + } else + return(packet_ring_bind(sk, dev)); +} + +/* ************************************* */ + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) + +volatile void* virt_to_kseg(volatile void* address) { + pte_t *pte; + pud_t *pud; + unsigned long addr = (unsigned long)address; + + pud = pud_offset(pgd_offset_k((unsigned long) address), + (unsigned long) address); + + /* + High-memory support courtesy of + Brad Doctor + */ +#if defined(CONFIG_X86_PAE) && (!defined(CONFIG_NOHIGHMEM)) + pte = pte_offset_map(pmd_offset(pud, addr), addr); +#else + pte = pmd_offset_map(pud, addr); +#endif + + return((volatile void*)pte_page(*pte)); +} + +#else /* 2.4 */ + +/* http://www.scs.ch/~frey/linux/memorymap.html */ +volatile void *virt_to_kseg(volatile void *address) +{ + pgd_t *pgd; pmd_t *pmd; pte_t *ptep, pte; + unsigned long va, ret = 0UL; + + va=VMALLOC_VMADDR((unsigned long)address); + + /* get the page directory. Use the kernel memory map. */ + pgd = pgd_offset_k(va); + + /* check whether we found an entry */ + if (!pgd_none(*pgd)) + { + /* get the page middle directory */ + pmd = pmd_offset(pgd, va); + /* check whether we found an entry */ + if (!pmd_none(*pmd)) + { + /* get a pointer to the page table entry */ + ptep = pte_offset(pmd, va); + pte = *ptep; + /* check for a valid page */ + if (pte_present(pte)) + { + /* get the address the page is refering to */ + ret = (unsigned long)page_address(pte_page(pte)); + /* add the offset within the page to the page address */ + ret |= (va & (PAGE_SIZE -1)); + } + } + } + return((volatile void *)ret); +} +#endif + +/* ************************************* */ + +static int ring_mmap(struct file *file, + struct socket *sock, + struct vm_area_struct *vma) +{ + struct sock *sk = sock->sk; + struct ring_opt *pfr = ring_sk(sk); + unsigned long size, start; + u_int pagesToMap; + char *ptr; + +#if defined(RING_DEBUG) + printk("RING: ring_mmap() called\n"); +#endif + + if(pfr->ring_memory == 0) { +#if defined(RING_DEBUG) + printk("RING: ring_mmap() failed: mapping area to an unbound socket\n"); +#endif + return -EINVAL; + } + + size = (unsigned long)(vma->vm_end-vma->vm_start); + + if(size % PAGE_SIZE) { +#if defined(RING_DEBUG) + printk("RING: ring_mmap() failed: len is not multiple of PAGE_SIZE\n"); +#endif + return(-EINVAL); + } + + /* if userspace tries to mmap beyond end of our buffer, fail */ + if(size > pfr->slots_info->tot_mem) { +#if defined(RING_DEBUG) + printk("proc_mmap() failed: area too large [%ld > %d]\n", size, pfr->slots_info->tot_mem); +#endif + return(-EINVAL); + } + + pagesToMap = size/PAGE_SIZE; + +#if defined(RING_DEBUG) + printk("RING: ring_mmap() called. %d pages to map\n", pagesToMap); +#endif + +#if defined(RING_DEBUG) + printk("RING: mmap [slot_len=%d][tot_slots=%d] for ring on device %s\n", + pfr->slots_info->slot_len, pfr->slots_info->tot_slots, + pfr->ring_netdev->name); +#endif + + /* we do not want to have this area swapped out, lock it */ + vma->vm_flags |= VM_LOCKED; + start = vma->vm_start; + + /* Ring slots start from page 1 (page 0 is reserved for FlowSlotInfo) */ + ptr = (char*)(start+PAGE_SIZE); + + if(remap_page_range( +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) + vma, +#endif + start, + __pa(pfr->ring_memory), + PAGE_SIZE*pagesToMap, vma->vm_page_prot)) { +#if defined(RING_DEBUG) + printk("remap_page_range() failed\n"); +#endif + return(-EAGAIN); + } + +#if defined(RING_DEBUG) + printk("proc_mmap(pagesToMap=%d): success.\n", pagesToMap); +#endif + + return 0; +} + +/* ************************************* */ + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) +static int ring_recvmsg(struct kiocb *iocb, struct socket *sock, + struct msghdr *msg, size_t len, int flags) +#else + static int ring_recvmsg(struct socket *sock, struct msghdr *msg, int len, + int flags, struct scm_cookie *scm) +#endif +{ + FlowSlot* slot; + struct ring_opt *pfr = ring_sk(sock->sk); + u_int32_t queued_pkts, num_loops = 0; + +#if defined(RING_DEBUG) + printk("ring_recvmsg called\n"); +#endif + + slot = get_remove_slot(pfr); + + while((queued_pkts = num_queued_pkts(pfr)) < MIN_QUEUED_PKTS) { + wait_event_interruptible(pfr->ring_slots_waitqueue, 1); + +#if defined(RING_DEBUG) + printk("-> ring_recvmsg returning %d [queued_pkts=%d][num_loops=%d]\n", + slot->slot_state, queued_pkts, num_loops); +#endif + + if(queued_pkts > 0) { + if(num_loops++ > MAX_QUEUE_LOOPS) + break; + } + } + +#if defined(RING_DEBUG) + if(slot != NULL) + printk("ring_recvmsg is returning [queued_pkts=%d][num_loops=%d]\n", + queued_pkts, num_loops); +#endif + + return(queued_pkts); +} + +/* ************************************* */ + +unsigned int ring_poll(struct file * file, + struct socket *sock, poll_table *wait) +{ + FlowSlot* slot; + struct ring_opt *pfr = ring_sk(sock->sk); + +#if defined(RING_DEBUG) + printk("poll called\n"); +#endif + + slot = get_remove_slot(pfr); + + if((slot != NULL) && (slot->slot_state == 0)) + poll_wait(file, &pfr->ring_slots_waitqueue, wait); + +#if defined(RING_DEBUG) + printk("poll returning %d\n", slot->slot_state); +#endif + + if((slot != NULL) && (slot->slot_state == 1)) + return(POLLIN | POLLRDNORM); + else + return(0); +} + +/* ************************************* */ + +int add_to_cluster_list(struct ring_cluster *el, + struct sock *sock) { + + if(el->num_cluster_elements == CLUSTER_LEN) + return(-1); /* Cluster full */ + + ring_sk_datatype(ring_sk(sock))->cluster_id = el->cluster_id; + el->sk[el->num_cluster_elements] = sock; + el->num_cluster_elements++; + return(0); +} + +/* ************************************* */ + +int remove_from_cluster_list(struct ring_cluster *el, + struct sock *sock) { + int i, j; + + for(i=0; isk[i] == sock) { + el->num_cluster_elements--; + + if(el->num_cluster_elements > 0) { + /* The cluster contains other elements */ + for(j=i; jsk[j] = el->sk[j+1]; + + el->sk[CLUSTER_LEN-1] = NULL; + } else { + /* Empty cluster */ + memset(el->sk, 0, sizeof(el->sk)); + } + + return(0); + } + + return(-1); /* Not found */ +} + +/* ************************************* */ + +static int remove_from_cluster(struct sock *sock, + struct ring_opt *pfr) +{ + struct ring_cluster *el; + +#if defined(RING_DEBUG) + printk("--> remove_from_cluster(%d)\n", pfr->cluster_id); +#endif + + if(pfr->cluster_id == 0 /* 0 = No Cluster */) + return(0); /* Noting to do */ + + el = ring_cluster_list; + + while(el != NULL) { + if(el->cluster_id == pfr->cluster_id) { + return(remove_from_cluster_list(el, sock)); + } else + el = el->next; + } + + return(-EINVAL); /* Not found */ +} + +/* ************************************* */ + +static int add_to_cluster(struct sock *sock, + struct ring_opt *pfr, + u_short cluster_id) +{ + struct ring_cluster *el; + +#ifndef RING_DEBUG + printk("--> add_to_cluster(%d)\n", cluster_id); +#endif + + if(cluster_id == 0 /* 0 = No Cluster */) return(-EINVAL); + + if(pfr->cluster_id != 0) + remove_from_cluster(sock, pfr); + + el = ring_cluster_list; + + while(el != NULL) { + if(el->cluster_id == cluster_id) { + return(add_to_cluster_list(el, sock)); + } else + el = el->next; + } + + /* There's no existing cluster. We need to create one */ + if((el = kmalloc(sizeof(struct ring_cluster), GFP_KERNEL)) == NULL) + return(-ENOMEM); + + el->cluster_id = cluster_id; + el->num_cluster_elements = 1; + el->hashing_mode = cluster_per_flow; /* Default */ + el->hashing_id = 0; + + memset(el->sk, 0, sizeof(el->sk)); + el->sk[0] = sock; + el->next = ring_cluster_list; + ring_cluster_list = el; + pfr->cluster_id = cluster_id; + + return(0); /* 0 = OK */ +} + +/* ************************************* */ + +/* Code taken/inspired from core/sock.c */ +static int ring_setsockopt(struct socket *sock, + int level, int optname, + char *optval, int optlen) +{ + struct ring_opt *pfr = ring_sk(sock->sk); + int val, found, ret = 0; + u_int cluster_id; + char devName[8]; + + if((optleninsns, fprog.filter, fsize)) + break; + + filter->len = fprog.len; + + if(sk_chk_filter(filter->insns, filter->len) != 0) { + /* Bad filter specified */ + kfree(filter); + pfr->bpfFilter = NULL; + break; + } + + /* get the lock, set the filter, release the lock */ + write_lock(&ring_mgmt_lock); + pfr->bpfFilter = filter; + write_unlock(&ring_mgmt_lock); + } + ret = 0; + break; + + case SO_DETACH_FILTER: + write_lock(&ring_mgmt_lock); + found = 1; + if(pfr->bpfFilter != NULL) { + kfree(pfr->bpfFilter); + pfr->bpfFilter = NULL; + write_unlock(&ring_mgmt_lock); + break; + } + ret = -ENONET; + break; + + case SO_ADD_TO_CLUSTER: + if (optlen!=sizeof(val)) + return -EINVAL; + + if (copy_from_user(&cluster_id, optval, sizeof(cluster_id))) + return -EFAULT; + + write_lock(&ring_mgmt_lock); + ret = add_to_cluster(sock->sk, pfr, cluster_id); + write_unlock(&ring_mgmt_lock); + break; + + case SO_REMOVE_FROM_CLUSTER: + write_lock(&ring_mgmt_lock); + ret = remove_from_cluster(sock->sk, pfr); + write_unlock(&ring_mgmt_lock); + break; + + case SO_SET_REFLECTOR: + if(optlen >= (sizeof(devName)-1)) + return -EINVAL; + + if(optlen > 0) { + if(copy_from_user(devName, optval, optlen)) + return -EFAULT; + } + + devName[optlen] = '\0'; + +#if defined(RING_DEBUG) + printk("+++ SO_SET_REFLECTOR(%s)\n", devName); +#endif + + write_lock(&ring_mgmt_lock); + pfr->reflector_dev = dev_get_by_name(devName); + write_unlock(&ring_mgmt_lock); + +#if defined(RING_DEBUG) + if(pfr->reflector_dev != NULL) + printk("SO_SET_REFLECTOR(%s): succeded\n", devName); + else + printk("SO_SET_REFLECTOR(%s): device unknown\n", devName); +#endif + break; + + default: + found = 0; + break; + } + + if(found) + return(ret); + else + return(sock_setsockopt(sock, level, optname, optval, optlen)); +} + +/* ************************************* */ + +static int ring_ioctl(struct socket *sock, + unsigned int cmd, unsigned long arg) +{ + switch(cmd) + { + case SIOCGIFFLAGS: + case SIOCSIFFLAGS: + case SIOCGIFCONF: + case SIOCGIFMETRIC: + case SIOCSIFMETRIC: + case SIOCGIFMEM: + case SIOCSIFMEM: + case SIOCGIFMTU: + case SIOCSIFMTU: + case SIOCSIFLINK: + case SIOCGIFHWADDR: + case SIOCSIFHWADDR: + case SIOCSIFMAP: + case SIOCGIFMAP: + case SIOCSIFSLAVE: + case SIOCGIFSLAVE: + case SIOCGIFINDEX: + case SIOCGIFNAME: + case SIOCGIFCOUNT: + case SIOCSIFHWBROADCAST: + return(dev_ioctl(cmd,(void *) arg)); + + default: + return -EOPNOTSUPP; + } + + return 0; +} + +/* ************************************* */ + +static struct proto_ops ring_ops = { + .family = PF_RING, +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) + .owner = THIS_MODULE, +#endif + + /* Operations that make no sense on ring sockets. */ + .connect = sock_no_connect, + .socketpair = sock_no_socketpair, + .accept = sock_no_accept, + .getname = sock_no_getname, + .listen = sock_no_listen, + .shutdown = sock_no_shutdown, + .sendpage = sock_no_sendpage, + .sendmsg = sock_no_sendmsg, + .getsockopt = sock_no_getsockopt, + + /* Now the operations that really occur. */ + .release = ring_release, + .bind = ring_bind, + .mmap = ring_mmap, + .poll = ring_poll, + .setsockopt = ring_setsockopt, + .ioctl = ring_ioctl, + .recvmsg = ring_recvmsg, +}; + +/* ************************************ */ + +static struct net_proto_family ring_family_ops = { + .family = PF_RING, + .create = ring_create, +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) + .owner = THIS_MODULE, +#endif +}; + +// BD: API changed in 2.6.12, ref: +// http://svn.clkao.org/svnweb/linux/revision/?rev=28201 +#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,11)) +static struct proto ring_proto = { + .name = "PF_RING", + .owner = THIS_MODULE, + .obj_size = sizeof(struct sock), +}; +#endif + +/* ************************************ */ + +static void __exit ring_exit(void) +{ + struct list_head *ptr; + struct ring_element *entry; + + for(ptr = ring_table.next; ptr != &ring_table; ptr = ptr->next) { + entry = list_entry(ptr, struct ring_element, list); + kfree(entry); + } + + while(ring_cluster_list != NULL) { + struct ring_cluster *next = ring_cluster_list->next; + kfree(ring_cluster_list); + ring_cluster_list = next; + } + + set_skb_ring_handler(NULL); + set_buffer_ring_handler(NULL); + sock_unregister(PF_RING); + + printk("PF_RING shut down.\n"); +} + +/* ************************************ */ + +static int __init ring_init(void) +{ + printk("Welcome to PF_RING %s\n(C) 2004 L.Deri \n", + RING_VERSION); + + INIT_LIST_HEAD(&ring_table); + ring_cluster_list = NULL; + + sock_register(&ring_family_ops); + + set_skb_ring_handler(skb_ring_handler); + set_buffer_ring_handler(buffer_ring_handler); + + if(get_buffer_ring_handler() != buffer_ring_handler) { + printk("PF_RING: set_buffer_ring_handler FAILED\n"); + + set_skb_ring_handler(NULL); + set_buffer_ring_handler(NULL); + sock_unregister(PF_RING); + return -1; + } else { + printk("PF_RING: bucket length %d bytes\n", bucket_len); + printk("PF_RING: ring slots %d\n", num_slots); + printk("PF_RING: sample rate %d [1=no sampling]\n", sample_rate); + printk("PF_RING: capture TX %s\n", + enable_tx_capture ? "Yes [RX+TX]" : "No [RX only]"); + printk("PF_RING: transparent mode %s\n", + transparent_mode ? "Yes" : "No"); + + printk("PF_RING initialized correctly.\n"); + return 0; + } +} + +module_init(ring_init); +module_exit(ring_exit); +MODULE_LICENSE("GPL"); + +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)) +MODULE_ALIAS_NETPROTO(PF_RING); +#endif